mirror of
https://github.com/Relintai/programming_tutorials.git
synced 2025-05-01 22:17:59 +02:00
1428 lines
31 KiB
C++
1428 lines
31 KiB
C++
#include <stdio.h>
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#define SDL_MAIN_HANDLED
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#include <SDL2/SDL.h>
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#ifdef __unix__
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#define GL_GLEXT_PROTOTYPES
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#include <GL/gl.h>
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#endif
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#ifdef _WIN64
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#include <glad/glad.h>
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#endif
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#ifdef __EMSCRIPTEN__
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#include <emscripten.h>
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#endif
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SDL_Window *window;
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SDL_GLContext context;
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bool running = true;
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void first_2d_triangle() {
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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//immediate mode
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glBegin(GL_TRIANGLES);
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glVertex2f(0.0, 0.5);
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glVertex2f(0.5, -0.5);
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glVertex2f(-0.5, -0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_2d_triangle_colored() {
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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//immediate mode
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glBegin(GL_TRIANGLES);
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glColor3f(1, 0, 0);
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glVertex2f(0.0, 0.5);
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glColor3f(0, 1, 0);
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glVertex2f(0.5, -0.5);
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glColor3f(0, 0, 1);
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glVertex2f(-0.5, -0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_2d_quad() {
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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//immediate mode
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glBegin(GL_QUADS);
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glVertex2f(0.5, 0.5);
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glVertex2f(0.5, -0.5);
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glVertex2f(-0.5, -0.5);
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glVertex2f(-0.5, 0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_2d_quad_colored() {
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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//immediate mode
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glBegin(GL_QUADS);
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glColor3f(1, 0, 0);
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glVertex2f(0.5, 0.5);
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glColor3f(0.5, 0.5, 0.5);
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glVertex2f(0.5, -0.5);
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glColor3f(0, 1, 0);
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glVertex2f(-0.5, -0.5);
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glColor3f(0, 0, 1);
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glVertex2f(-0.5, 0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_3d_triangle() {
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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glBegin(GL_TRIANGLES);
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glVertex3f(0, 0.5, 0);
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glVertex3f(0.5, -0.5, 0);
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glVertex3f(-0.5, -0.5, 0);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_3d_triangle_color() {
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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glBegin(GL_TRIANGLES);
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glColor3f(1, 0, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 1, 0);
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glVertex3f(0.5, -0.5, 0);
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glColor3f(0,0,1);
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glVertex3f(-0.5, -0.5, 0);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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float c3dc_rot = 0;
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void first_3d_triangle_color_rotated() {
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c3dc_rot += 1;
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0.5, 0, 0);
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glRotatef(c3dc_rot, 0, 1, 0);
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glBegin(GL_TRIANGLES);
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glColor3f(1, 0, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 1, 0);
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glVertex3f(0.5, -0.5, 0);
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glColor3f(0,0,1);
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glVertex3f(-0.5, -0.5, 0);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_3d_triangle_color_rotated_face_culling() {
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c3dc_rot += 1;
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glRotatef(c3dc_rot, 0, 1, 0);
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glEnable(GL_CULL_FACE);
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//alap
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//glCullFace(GL_BACK);
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//glCullFace(GL_FRONT);
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//glCullFace(GL_FRONT_AND_BACK);
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//Winding order
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//alap:
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//glFrontFace(GL_CCW);
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//glFrontFace(GL_CW);
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glBegin(GL_TRIANGLES);
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glColor3f(1, 0, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(0,0,1);
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glVertex3f(-0.5, -0.5, 0);
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glColor3f(0, 1, 0);
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glVertex3f(0.5, -0.5, 0);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_3d_cone() {
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c3dc_rot += 1;
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//Ebben a példában a -z jön a kamera fele (alapbeállítás)
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glRotatef(c3dc_rot, 0, 1, 0);
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glBegin(GL_TRIANGLES);
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//eleje
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glColor3f(1, 0, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(1,0,0);
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glVertex3f(-0.5, -0.5, -0.5);
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glColor3f(1, 0, 0);
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glVertex3f(0.5, -0.5, -0.5);
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//bal
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glColor3f(0, 1, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, -0.5, 0.5);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, -0.5, -0.5);
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//jobb
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glColor3f(0, 0, 1);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 0, 1);
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glVertex3f(0.5, -0.5, -0.5);
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glColor3f(0, 0, 1);
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glVertex3f(0.5, -0.5, 0.5);
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//hátulja
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glColor3f(1, 1, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(1, 1, 0);
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glVertex3f(0.5, -0.5, 0.5);
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glColor3f(1, 1, 0);
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glVertex3f(-0.5, -0.5, 0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_3d_cone_ortho() {
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c3dc_rot += 1;
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//Ebben a példában a -z jön a kamera fele (alapbeállítás)
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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//alapbeállítás:
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//glOrtho(-1, 1, -1, 1, 1, -1);
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// glOrtho(-2, 2, -1, 1, 1, -1);
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// glOrtho(-1, 1, -2, 2, 1, -1);
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//glOrtho(-1, 1, -0.75, 0.75, 1, -1);
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//glTranslatef(0, 1, 0);
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//glTranslatef(1, 0, 0);
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glOrtho(-1.33, 1.33, -1, 1, 1, -1);
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//glOrtho(-1.33, 1.33, -1, 1, -1, 1);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glRotatef(c3dc_rot, 0, 1, 0);
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glBegin(GL_TRIANGLES);
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//eleje
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glColor3f(1, 0, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(1,0,0);
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glVertex3f(-0.5, -0.5, -0.5);
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glColor3f(1, 0, 0);
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glVertex3f(0.5, -0.5, -0.5);
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//bal
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glColor3f(0, 1, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, -0.5, 0.5);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, -0.5, -0.5);
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//jobb
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glColor3f(0, 0, 1);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 0, 1);
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glVertex3f(0.5, -0.5, -0.5);
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glColor3f(0, 0, 1);
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glVertex3f(0.5, -0.5, 0.5);
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//hátulja
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glColor3f(1, 1, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(1, 1, 0);
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glVertex3f(0.5, -0.5, 0.5);
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glColor3f(1, 1, 0);
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glVertex3f(-0.5, -0.5, 0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void first_3d_cone_perspective() {
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c3dc_rot += 1;
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//Ebben a példában a +z jön a kamera fele (alapbeállítás)
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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//glFrustum(-1, 1, -1, 1, 1, 10);
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glFrustum(-1, 1, -0.75, 0.75, 1, 10);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0, 0, -2);
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glRotatef(c3dc_rot, 0, 1, 0);
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glBegin(GL_TRIANGLES);
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//eleje
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glColor3f(1, 0, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(1,0,0);
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glVertex3f(-0.5, -0.5, 0.5);
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glColor3f(1, 0, 0);
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glVertex3f(0.5, -0.5, 0.5);
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//bal
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glColor3f(0, 1, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, -0.5, -0.5);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, -0.5, 0.5);
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//jobb
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glColor3f(0, 0, 1);
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glVertex3f(0, 0.5, 0);
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glColor3f(0, 0, 1);
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glVertex3f(0.5, -0.5, 0.5);
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glColor3f(0, 0, 1);
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glVertex3f(0.5, -0.5, -0.5);
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//hátulja
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glColor3f(1, 1, 0);
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glVertex3f(0, 0.5, 0);
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glColor3f(1, 1, 0);
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glVertex3f(0.5, -0.5, -0.5);
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glColor3f(1, 1, 0);
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glVertex3f(-0.5, -0.5, -0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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float box_tris_rot = 0;
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bool box_tris_rot_dir = false;
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void box_tris() {
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if (box_tris_rot_dir)
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box_tris_rot += 0.5;
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else
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box_tris_rot -= 0.5;
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if (box_tris_rot > 90 || box_tris_rot < 0)
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box_tris_rot_dir = !box_tris_rot_dir;
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
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glTranslatef(0, 0.1, 0);
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glOrtho(-2, 2, -1.5, 1.5, -10, 10);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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//glTranslatef(0, 0, -2);
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glRotatef(30, 1, 0, 0);
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glRotatef(box_tris_rot, 0, 1, 0);
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glBegin(GL_TRIANGLES);
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glColor3f(1, 0, 0);
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glVertex3f(-0.5, 0.5, 0.5);
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glVertex3f(-0.5, -0.5, 0.5);
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glVertex3f(0.5, -0.5, 0.5);
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glColor3f(0.5, 0, 0);
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glVertex3f(0.5, -0.5, 0.5);
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glVertex3f(0.5, 0.5, 0.5);
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glVertex3f(-0.5, 0.5, 0.5);
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glColor3f(0, 1, 0);
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glVertex3f(-0.5, 0.5, -0.5);
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glVertex3f(-0.5, -0.5, -0.5);
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glVertex3f(-0.5, 0.5, 0.5);
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glColor3f(0, 0.5, 0);
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glVertex3f(-0.5, 0.5, 0.5);
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glVertex3f(-0.5, -0.5, -0.5);
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glVertex3f(-0.5, -0.5, 0.5);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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void box_tris_lights() {
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if (box_tris_rot_dir)
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box_tris_rot += 0.5;
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else
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box_tris_rot -= 0.5;
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if (box_tris_rot > 90 || box_tris_rot < 0)
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box_tris_rot_dir = !box_tris_rot_dir;
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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float light1_ambient[] = { 0, 0, 0, 1 };
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float light1_diffuse[] = { 1, 1, 1, 1 };
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float light1_specular[] = { 1, 1, 1, 1 };
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float light1_pos[] = { -2, 1, 1 };
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glLightfv(GL_LIGHT0, GL_AMBIENT, light1_ambient);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, light1_diffuse);
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glLightfv(GL_LIGHT0, GL_SPECULAR, light1_specular);
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glLightfv(GL_LIGHT0, GL_POSITION, light1_pos);
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glEnable(GL_LIGHT1);
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float light2_ambient[] = { 0, 0, 0, 1 };
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float light2_diffuse[] = { 1, 0, 0, 1 };
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float light2_specular[] = { 1, 1, 1, 1 };
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float light2_pos[] = { 1, 1, 2 };
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glLightfv(GL_LIGHT1, GL_AMBIENT, light2_ambient);
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glLightfv(GL_LIGHT1, GL_DIFFUSE, light2_diffuse);
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glLightfv(GL_LIGHT1, GL_SPECULAR, light2_specular);
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glLightfv(GL_LIGHT1, GL_POSITION, light2_pos);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
|
|
glTranslatef(0, 0.1, 0);
|
|
glOrtho(-2, 2, -1.5, 1.5, -10, 10);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
//glTranslatef(0, 0, -2);
|
|
glRotatef(30, 1, 0, 0);
|
|
glRotatef(box_tris_rot, 0, 1, 0);
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
|
|
glColor3f(1, 0, 0);
|
|
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, -0.5, 0.5);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, -0.5, 0.5);
|
|
|
|
glColor3f(0.5, 0, 0);
|
|
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, -0.5, 0.5);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, 0.5, 0.5);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
glColor3f(0, 1, 0);
|
|
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, -0.5);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, -0.5);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
glColor3f(0, 0.5, 0);
|
|
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, -0.5);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, 0.5);
|
|
|
|
glEnd();
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
|
|
bool texture_loaded = false;
|
|
GLuint texture;
|
|
void loadGLTextures(const char *file_name) {
|
|
if (texture_loaded)
|
|
return;
|
|
|
|
texture_loaded = true;
|
|
|
|
SDL_Surface *texture_image;
|
|
texture_image = SDL_LoadBMP(file_name);
|
|
|
|
if (!texture_image) {
|
|
printf("Couldn't load %s.\n", file_name);
|
|
} else {
|
|
|
|
glGenTextures(1, &texture);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
glTexImage2D(GL_TEXTURE_2D, 0, 3, texture_image->w, texture_image->h, 0, GL_RGB, GL_UNSIGNED_BYTE, texture_image->pixels);
|
|
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
|
|
|
//(bi)linear filtering
|
|
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
SDL_FreeSurface(texture_image);
|
|
}
|
|
}
|
|
|
|
void first_2d_triangle_uv() {
|
|
loadGLTextures("img_forest.bmp");
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
//immediate mode
|
|
glBegin(GL_TRIANGLES);
|
|
glTexCoord2f(0.5, 0);
|
|
glVertex2f(0.0, 0.5);
|
|
|
|
glTexCoord2f(1, 1);
|
|
glVertex2f(0.5, -0.5);
|
|
|
|
glTexCoord2f(0, 1);
|
|
glVertex2f(-0.5, -0.5);
|
|
glEnd();
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void first_2d_triangle_quad_uv() {
|
|
loadGLTextures("img_forest.bmp");
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
//immediate mode
|
|
glBegin(GL_TRIANGLES);
|
|
glTexCoord2f(0, 0);
|
|
glVertex2f(-0.5, 0.5);
|
|
|
|
glTexCoord2f(1, 1);
|
|
glVertex2f(0.5, -0.5);
|
|
|
|
glTexCoord2f(0, 1);
|
|
glVertex2f(-0.5, -0.5);
|
|
|
|
|
|
glTexCoord2f(1, 1);
|
|
glVertex2f(0.5, -0.5);
|
|
|
|
glTexCoord2f(0, 0);
|
|
glVertex2f(-0.5, 0.5);
|
|
|
|
glTexCoord2f(1, 0);
|
|
glVertex2f(0.5, 0.5);
|
|
glEnd();
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void box_tris_lights_uv() {
|
|
loadGLTextures("img_forest.bmp");
|
|
|
|
if (box_tris_rot_dir)
|
|
box_tris_rot += 0.5;
|
|
else
|
|
box_tris_rot -= 0.5;
|
|
|
|
if (box_tris_rot > 90 || box_tris_rot < 0)
|
|
box_tris_rot_dir = !box_tris_rot_dir;
|
|
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glEnable(GL_LIGHTING);
|
|
|
|
glEnable(GL_LIGHT0);
|
|
|
|
float light1_ambient[] = { 0, 0, 0, 1 };
|
|
float light1_diffuse[] = { 1, 1, 1, 1 };
|
|
float light1_specular[] = { 1, 1, 1, 1 };
|
|
float light1_pos[] = { -2, 1, 1 };
|
|
|
|
glLightfv(GL_LIGHT0, GL_AMBIENT, light1_ambient);
|
|
glLightfv(GL_LIGHT0, GL_DIFFUSE, light1_diffuse);
|
|
glLightfv(GL_LIGHT0, GL_SPECULAR, light1_specular);
|
|
glLightfv(GL_LIGHT0, GL_POSITION, light1_pos);
|
|
|
|
glEnable(GL_LIGHT1);
|
|
|
|
float light2_ambient[] = { 0, 0, 0, 1 };
|
|
float light2_diffuse[] = { 1, 0, 0, 1 };
|
|
float light2_specular[] = { 1, 1, 1, 1 };
|
|
float light2_pos[] = { 1, 1, 2 };
|
|
|
|
glLightfv(GL_LIGHT1, GL_AMBIENT, light2_ambient);
|
|
glLightfv(GL_LIGHT1, GL_DIFFUSE, light2_diffuse);
|
|
glLightfv(GL_LIGHT1, GL_SPECULAR, light2_specular);
|
|
glLightfv(GL_LIGHT1, GL_POSITION, light2_pos);
|
|
|
|
glEnable(GL_TEXTURE_2D);
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
|
|
//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
|
|
glTranslatef(0, 0.1, 0);
|
|
glOrtho(-2, 2, -1.5, 1.5, -10, 10);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
//glTranslatef(0, 0, -2);
|
|
glRotatef(30, 1, 0, 0);
|
|
glRotatef(box_tris_rot, 0, 1, 0);
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
|
|
//glColor3f(1, 0, 0);
|
|
glTexCoord2f(0, 0);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
glTexCoord2f(0, 1);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, -0.5, 0.5);
|
|
|
|
glTexCoord2f(1, 1);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, -0.5, 0.5);
|
|
|
|
//glColor3f(0.5, 0, 0);
|
|
glTexCoord2f(1, 1);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, -0.5, 0.5);
|
|
|
|
glTexCoord2f(1, 0);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, 0.5, 0.5);
|
|
|
|
glTexCoord2f(0, 0);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
//glColor3f(0, 1, 0);
|
|
glTexCoord2f(0, 0);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, -0.5);
|
|
|
|
glTexCoord2f(0, 1);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, -0.5);
|
|
|
|
glTexCoord2f(1, 0);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
// glColor3f(0, 0.5, 0);
|
|
glTexCoord2f(1, 0);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
glTexCoord2f(0, 1);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, -0.5);
|
|
|
|
glTexCoord2f(1, 1);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, 0.5);
|
|
|
|
glEnd();
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
|
|
#define ATLAS_SIZE_X 16.0
|
|
#define ATLAS_SIZE_Y 16.0
|
|
void add_tex_coord(int atlas_coord_x, int atlas_coord_y, float uv_x, float uv_y) {
|
|
float tile_size_x = 1.0 / ATLAS_SIZE_X;
|
|
float tile_size_y = 1.0 / ATLAS_SIZE_Y;
|
|
|
|
float pos_x = tile_size_x * atlas_coord_x;
|
|
float pos_y = tile_size_y * atlas_coord_y;
|
|
|
|
float offset_x = uv_x * tile_size_x;
|
|
float offset_y = uv_y * tile_size_y;
|
|
|
|
glTexCoord2f(pos_x + offset_x, pos_y + offset_y);
|
|
}
|
|
|
|
void box_tris_lights_uv_texture_atlas() {
|
|
loadGLTextures("download.bmp");
|
|
|
|
if (box_tris_rot_dir)
|
|
box_tris_rot += 0.5;
|
|
else
|
|
box_tris_rot -= 0.5;
|
|
|
|
if (box_tris_rot > 90 || box_tris_rot < 0)
|
|
box_tris_rot_dir = !box_tris_rot_dir;
|
|
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glEnable(GL_LIGHTING);
|
|
|
|
glEnable(GL_LIGHT0);
|
|
|
|
float light1_ambient[] = { 0, 0, 0, 1 };
|
|
float light1_diffuse[] = { 1, 1, 1, 1 };
|
|
float light1_specular[] = { 1, 1, 1, 1 };
|
|
float light1_pos[] = { -2, 1, 1 };
|
|
|
|
glLightfv(GL_LIGHT0, GL_AMBIENT, light1_ambient);
|
|
glLightfv(GL_LIGHT0, GL_DIFFUSE, light1_diffuse);
|
|
glLightfv(GL_LIGHT0, GL_SPECULAR, light1_specular);
|
|
glLightfv(GL_LIGHT0, GL_POSITION, light1_pos);
|
|
|
|
glEnable(GL_LIGHT1);
|
|
|
|
float light2_ambient[] = { 0, 0, 0, 1 };
|
|
float light2_diffuse[] = { 1, 0, 0, 1 };
|
|
float light2_specular[] = { 1, 1, 1, 1 };
|
|
float light2_pos[] = { 1, 1, 2 };
|
|
|
|
glLightfv(GL_LIGHT1, GL_AMBIENT, light2_ambient);
|
|
glLightfv(GL_LIGHT1, GL_DIFFUSE, light2_diffuse);
|
|
glLightfv(GL_LIGHT1, GL_SPECULAR, light2_specular);
|
|
glLightfv(GL_LIGHT1, GL_POSITION, light2_pos);
|
|
|
|
glEnable(GL_TEXTURE_2D);
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
|
|
//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
|
|
glTranslatef(0, 0.1, 0);
|
|
glOrtho(-2, 2, -1.5, 1.5, -10, 10);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
//glTranslatef(0, 0, -2);
|
|
glRotatef(30, 1, 0, 0);
|
|
glRotatef(box_tris_rot, 0, 1, 0);
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
int atlas_coord_1_x = 3;
|
|
int atlas_coord_1_y = 3;
|
|
|
|
int atlas_coord_2_x = 2;
|
|
int atlas_coord_2_y = 3;
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
|
|
//glColor3f(1, 0, 0);
|
|
add_tex_coord(atlas_coord_1_x, atlas_coord_1_y, 0, 0);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
add_tex_coord(atlas_coord_1_x, atlas_coord_1_y, 0, 1);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, -0.5, 0.5);
|
|
|
|
add_tex_coord(atlas_coord_1_x, atlas_coord_1_y, 1, 1);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, -0.5, 0.5);
|
|
|
|
//glColor3f(0.5, 0, 0);
|
|
add_tex_coord(atlas_coord_1_x, atlas_coord_1_y, 1, 1);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, -0.5, 0.5);
|
|
|
|
add_tex_coord(atlas_coord_1_x, atlas_coord_1_y, 1, 0);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(0.5, 0.5, 0.5);
|
|
|
|
add_tex_coord(atlas_coord_1_x, atlas_coord_1_y, 0, 0);
|
|
glNormal3f(0, 0, 1);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
//glColor3f(0, 1, 0);
|
|
add_tex_coord(atlas_coord_2_x, atlas_coord_2_y, 0, 0);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, -0.5);
|
|
|
|
add_tex_coord(atlas_coord_2_x, atlas_coord_2_y, 0, 1);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, -0.5);
|
|
|
|
add_tex_coord(atlas_coord_2_x, atlas_coord_2_y, 1, 0);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
// glColor3f(0, 0.5, 0);
|
|
add_tex_coord(atlas_coord_2_x, atlas_coord_2_y, 1, 0);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, 0.5, 0.5);
|
|
|
|
add_tex_coord(atlas_coord_2_x, atlas_coord_2_y, 0, 1);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, -0.5);
|
|
|
|
add_tex_coord(atlas_coord_2_x, atlas_coord_2_y, 1, 1);
|
|
glNormal3f(-1, 0, 0);
|
|
glVertex3f(-0.5, -0.5, 0.5);
|
|
|
|
glEnd();
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void first_2d_triangle_vertex_array() {
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
GLfloat vertices[] = {
|
|
0.0, 0.5,
|
|
0.5, -0.5,
|
|
-0.5, -0.5
|
|
};
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
|
|
glVertexPointer(2, GL_FLOAT, 0, vertices);
|
|
glDrawArrays(GL_TRIANGLES, 0, 3);
|
|
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void first_3d_triangle_vertex_array() {
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
GLfloat vertices[] = {
|
|
0.0, 0.5, 0.0,
|
|
0.5, -0.5, 0.0,
|
|
-0.5, -0.5, 0.0,
|
|
};
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, vertices);
|
|
glDrawArrays(GL_TRIANGLES, 0, 3);
|
|
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void first_3d_triangle_vertex_array_colors() {
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
GLfloat vertices[] = {
|
|
0.0, 0.5, 0.0,
|
|
0.5, -0.5, 0.0,
|
|
-0.5, -0.5, 0.0,
|
|
};
|
|
|
|
GLfloat colors[] = {
|
|
1, 0, 0,
|
|
0, 1, 0,
|
|
0, 0, 1
|
|
};
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
glEnableClientState(GL_COLOR_ARRAY);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, vertices);
|
|
glColorPointer(3, GL_FLOAT, 0, colors);
|
|
glDrawArrays(GL_TRIANGLES, 0, 3);
|
|
|
|
glDisableClientState(GL_COLOR_ARRAY);
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void box_tris_vertex_array() {
|
|
if (box_tris_rot_dir)
|
|
box_tris_rot += 0.5;
|
|
else
|
|
box_tris_rot -= 0.5;
|
|
|
|
if (box_tris_rot > 90 || box_tris_rot < 0)
|
|
box_tris_rot_dir = !box_tris_rot_dir;
|
|
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
|
|
//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
|
|
glTranslatef(0, 0.1, 0);
|
|
glOrtho(-2, 2, -1.5, 1.5, -10, 10);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
//glTranslatef(0, 0, -2);
|
|
//glRotatef(30, 1, 0, 0);
|
|
//glRotatef(box_tris_rot, 0, 1, 0);
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
GLfloat vertices[] = {
|
|
-0.5, 0.5, 0.5,
|
|
-0.5, -0.5, 0.5,
|
|
0.5, -0.5, 0.5,
|
|
|
|
0.5, -0.5, 0.5,
|
|
0.5, 0.5, 0.5,
|
|
-0.5, 0.5, 0.5,
|
|
};
|
|
|
|
GLfloat colors[] = {
|
|
1, 0, 0,
|
|
1, 0, 0,
|
|
1, 0, 0,
|
|
|
|
0.5, 0, 0,
|
|
0.5, 0, 0,
|
|
0.5, 0, 0,
|
|
};
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
glEnableClientState(GL_COLOR_ARRAY);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, vertices);
|
|
glColorPointer(3, GL_FLOAT, 0, colors);
|
|
glDrawArrays(GL_TRIANGLES, 0, 6);
|
|
|
|
glDisableClientState(GL_COLOR_ARRAY);
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void box_tris_vertex_array_indices() {
|
|
if (box_tris_rot_dir)
|
|
box_tris_rot += 0.5;
|
|
else
|
|
box_tris_rot -= 0.5;
|
|
|
|
if (box_tris_rot > 90 || box_tris_rot < 0)
|
|
box_tris_rot_dir = !box_tris_rot_dir;
|
|
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
|
|
//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
|
|
glTranslatef(0, 0.1, 0);
|
|
glOrtho(-2, 2, -1.5, 1.5, -10, 10);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
//glTranslatef(0, 0, -2);
|
|
//glRotatef(30, 1, 0, 0);
|
|
//glRotatef(box_tris_rot, 0, 1, 0);
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
GLfloat vertices[] = {
|
|
-0.5, 0.5, 0.5,
|
|
-0.5, -0.5, 0.5,
|
|
0.5, -0.5, 0.5,
|
|
0.5, 0.5, 0.5,
|
|
};
|
|
|
|
GLfloat colors[] = {
|
|
1, 0, 0,
|
|
0, 1, 0,
|
|
0, 0, 1,
|
|
1, 1, 0,
|
|
};
|
|
|
|
GLuint indices[] = {
|
|
0, 1, 2, 0, 2, 3
|
|
};
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
glEnableClientState(GL_COLOR_ARRAY);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, vertices);
|
|
glColorPointer(3, GL_FLOAT, 0, colors);
|
|
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, indices);
|
|
|
|
glDisableClientState(GL_COLOR_ARRAY);
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
void box_tris_vertex_array_indices_uv() {
|
|
loadGLTextures("download.bmp");
|
|
|
|
if (box_tris_rot_dir)
|
|
box_tris_rot += 0.5;
|
|
else
|
|
box_tris_rot -= 0.5;
|
|
|
|
if (box_tris_rot > 90 || box_tris_rot < 0)
|
|
box_tris_rot_dir = !box_tris_rot_dir;
|
|
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
|
|
//glFrustum(-1, 1, -0.75, 0.75, 1, 10);
|
|
glTranslatef(0, 0.1, 0);
|
|
glOrtho(-2, 2, -1.5, 1.5, -10, 10);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texture);
|
|
|
|
//glTranslatef(0, 0, -2);
|
|
//glRotatef(30, 1, 0, 0);
|
|
//glRotatef(box_tris_rot, 0, 1, 0);
|
|
|
|
glEnable(GL_CULL_FACE);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
GLfloat vertices[] = {
|
|
-0.5, 0.5, 0.5,
|
|
-0.5, -0.5, 0.5,
|
|
0.5, -0.5, 0.5,
|
|
0.5, 0.5, 0.5,
|
|
};
|
|
|
|
GLfloat uvs[] = {
|
|
0, 0,
|
|
0, 1,
|
|
1, 1,
|
|
1, 0
|
|
};
|
|
|
|
GLuint indices[] = {
|
|
0, 1, 2, 0, 2, 3
|
|
};
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, vertices);
|
|
glTexCoordPointer(2, GL_FLOAT, 0, uvs);
|
|
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, indices);
|
|
|
|
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
GLuint triange_VBO;
|
|
bool vbo_init = false;
|
|
|
|
void triangle_3d_vertex_buffer_object() {
|
|
if (!vbo_init) {
|
|
vbo_init = true;
|
|
|
|
GLfloat vertices[] = {
|
|
0.0, 0.5, 0.0,
|
|
0.5, -0.5, 0.0,
|
|
-0.5, -0.5, 0.0,
|
|
};
|
|
|
|
glGenBuffers(1, &triange_VBO);
|
|
glBindBuffer(GL_ARRAY_BUFFER, triange_VBO);
|
|
//sizeof(vertices) -> byte -> 9x4
|
|
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
|
|
}
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, triange_VBO);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, NULL);
|
|
glDrawArrays(GL_TRIANGLES, 0, 3);
|
|
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
size_t v_size = 0;
|
|
void triangle_3d_vertex_buffer_object_color() {
|
|
if (!vbo_init) {
|
|
vbo_init = true;
|
|
|
|
GLfloat vertices[] = {
|
|
0.0, 0.5, 0.0,
|
|
0.5, -0.5, 0.0,
|
|
-0.5, -0.5, 0.0,
|
|
};
|
|
|
|
GLfloat colors[] = {
|
|
1, 0, 0,
|
|
0, 1, 0,
|
|
0, 0, 1
|
|
};
|
|
|
|
//sizeof() -> tömb méret byte-ban
|
|
v_size = sizeof(vertices);
|
|
size_t c_size = sizeof(colors);
|
|
|
|
glGenBuffers(1, &triange_VBO);
|
|
glBindBuffer(GL_ARRAY_BUFFER, triange_VBO);
|
|
//ez így csak allokáció
|
|
glBufferData(GL_ARRAY_BUFFER, v_size + c_size, 0, GL_STATIC_DRAW);
|
|
|
|
glBufferSubData(GL_ARRAY_BUFFER, 0, v_size, vertices);
|
|
glBufferSubData(GL_ARRAY_BUFFER, v_size, c_size, colors);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glEnableClientState(GL_VERTEX_ARRAY);
|
|
glEnableClientState(GL_COLOR_ARRAY);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, triange_VBO);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, 0);
|
|
glColorPointer(3, GL_FLOAT, 0, (void*)v_size);
|
|
|
|
glDrawArrays(GL_TRIANGLES, 0, 3);
|
|
|
|
glDisableClientState(GL_COLOR_ARRAY);
|
|
glDisableClientState(GL_VERTEX_ARRAY);
|
|
|
|
SDL_GL_SwapWindow(window);
|
|
}
|
|
|
|
int current_demo = 24;
|
|
|
|
//gameloop
|
|
void handle_frame() {
|
|
//handle input
|
|
SDL_Event current_evevnt;
|
|
|
|
while(SDL_PollEvent(¤t_evevnt)) {
|
|
if (current_evevnt.type == SDL_QUIT) {
|
|
running = false;
|
|
}
|
|
}
|
|
|
|
//update world
|
|
//most ez nem kell
|
|
|
|
//render
|
|
switch (current_demo) {
|
|
case 0:
|
|
first_2d_triangle();
|
|
break;
|
|
case 1:
|
|
first_2d_triangle_colored();
|
|
break;
|
|
case 2:
|
|
first_2d_quad();
|
|
break;
|
|
case 3:
|
|
first_2d_quad_colored();
|
|
break;
|
|
case 4:
|
|
first_3d_triangle();
|
|
break;
|
|
case 5:
|
|
first_3d_triangle_color();
|
|
break;
|
|
case 6:
|
|
first_3d_triangle_color_rotated();
|
|
break;
|
|
case 7:
|
|
first_3d_triangle_color_rotated_face_culling();
|
|
break;
|
|
case 8:
|
|
first_3d_cone();
|
|
break;
|
|
case 9:
|
|
first_3d_cone_ortho();
|
|
break;
|
|
case 10:
|
|
first_3d_cone_perspective();
|
|
break;
|
|
case 11:
|
|
box_tris();
|
|
break;
|
|
case 12:
|
|
box_tris_lights();
|
|
break;
|
|
case 13:
|
|
first_2d_triangle_uv();
|
|
break;
|
|
case 14:
|
|
first_2d_triangle_quad_uv();
|
|
break;
|
|
case 15:
|
|
box_tris_lights_uv();
|
|
break;
|
|
case 16:
|
|
box_tris_lights_uv_texture_atlas();
|
|
break;
|
|
case 17:
|
|
first_2d_triangle_vertex_array();
|
|
break;
|
|
case 18:
|
|
first_3d_triangle_vertex_array();
|
|
break;
|
|
case 19:
|
|
first_3d_triangle_vertex_array_colors();
|
|
break;
|
|
case 20:
|
|
box_tris_vertex_array();
|
|
break;
|
|
case 21:
|
|
box_tris_vertex_array_indices();
|
|
break;
|
|
case 22:
|
|
box_tris_vertex_array_indices_uv();
|
|
break;
|
|
case 23:
|
|
triangle_3d_vertex_buffer_object();
|
|
break;
|
|
case 24:
|
|
triangle_3d_vertex_buffer_object_color();
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
int main(int argc, char *argv[]) {
|
|
|
|
SDL_SetMainReady();
|
|
int error = SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
|
|
|
|
if (error) {
|
|
SDL_Log("SDL_Init: %s", SDL_GetError());
|
|
|
|
return 1;
|
|
}
|
|
|
|
//Use OpenGl 2.1
|
|
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
|
|
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
|
|
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
|
|
|
|
window = SDL_CreateWindow("SDL + OpenGL", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL);
|
|
|
|
if (!window) {
|
|
SDL_Log("SDL_CreateWindow: %s", SDL_GetError());
|
|
|
|
return 1;
|
|
}
|
|
|
|
context = SDL_GL_CreateContext(window);
|
|
|
|
#ifdef _WIN64
|
|
gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress);
|
|
#endif
|
|
|
|
#ifdef __EMSCRIPTEN__
|
|
emscripten_set_main_loop(handle_frame, 0, 1);
|
|
#else
|
|
|
|
while (running) {
|
|
handle_frame();
|
|
}
|
|
#endif
|
|
|
|
printf("%s\n", glGetString(GL_VERSION));
|
|
|
|
if (vbo_init) {
|
|
glDeleteBuffers(1, &triange_VBO);
|
|
}
|
|
|
|
SDL_DestroyWindow(window);
|
|
|
|
window = nullptr;
|
|
|
|
SDL_Quit();
|
|
|
|
return 0;
|
|
} |