sfw/game_scene.cpp

#include "game_scene.h"

#include "application.h"

void GameScene::event(const SDL_Event &ev) {
    switch (ev.type) {
        case SDL_WINDOWEVENT: {
            switch (ev.window.event) {
                case SDL_WINDOWEVENT_SIZE_CHANGED: {
                    int width = ev.window.data1;
                    int height = ev.window.data2;

                    float ar = static_cast<float>(width) / static_cast<float>(height);

                    camera->width = camera->height * ar;

                    glViewport(0, 0, width, height);

                } break;
            }
        } break;
        case SDL_KEYDOWN: {

            if (ev.key.keysym.scancode == SDL_SCANCODE_A) {
                left = true;
            } else if (ev.key.keysym.scancode == SDL_SCANCODE_W) {
                up = true;
            } else if (ev.key.keysym.scancode == SDL_SCANCODE_S) {
                down = true;
            } else if (ev.key.keysym.scancode == SDL_SCANCODE_D) {
                right = true;
            }


        } break;
        case SDL_KEYUP: {

            if (ev.key.keysym.scancode == SDL_SCANCODE_A) {
                left = false;
            } else if (ev.key.keysym.scancode == SDL_SCANCODE_W) {
                up = false;
            } else if (ev.key.keysym.scancode == SDL_SCANCODE_S) {
                down = false;
            } else if (ev.key.keysym.scancode == SDL_SCANCODE_D) {
                right = false;
            }

        } break;
    }
}
void GameScene::update(float delta) {
    if (up) {
        sprite->position.y += delta * 3.0;
    }

    if (down) {
        sprite->position.y -= delta * 3.0;
    }

    if (left) {
        sprite->position.x -= delta * 3.0;
    }

    if (right) {
        sprite->position.x += delta * 3.0;
    }

    if (sprite->position.x < 1.5) {
        sprite->position.x = 1.5;
    }

    if (sprite->position.x > 14.5) {
        sprite->position.x = 14.5;
    }

    if (sprite->position.y < 1.5) {
        sprite->position.y = 1.5;
    }

    if (sprite->position.y > 14.5) {
        sprite->position.y = 14.5;
    }
}
void GameScene::render() {
    glClearColor(0, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);

    camera->bind();

    sprite->render();
}

GameScene::GameScene() {
    left = false;
    right = false;
    up = false;
    down = false;

    camera = new OrthographicCamera();
    camera->width = 16;
    camera->height = 16;
    camera->position.x = 8;
    camera->position.y = 8;
    //camera->position.z = -2;

    int w;
    int h;
    SDL_GetWindowSize(Application::get_singleton()->window, &w, &h);

    float ar = static_cast<float>(w) / static_cast<float>(h);
    camera->width = camera->height * ar;

    texture = new Texture();
    texture->load_image("download.bmp");

    material = new TextureMaterial();
    material->texture = texture;

    sprite = new Sprite();
    sprite->mesh_instance->material = material;
    sprite->height = 1;
    sprite->width = 1;
    sprite->position.x = 8;
    sprite->position.y = 8;

    float region_x = 7;
    float region_y = 7;

    sprite->region_x = region_x * (1.0 / 16.0);
    sprite->region_y = region_y * (1.0 / 16.0);
    sprite->region_width = 1.0 / 16.0;
    sprite->region_height = 1.0 / 16.0;

    sprite->update_mesh();
}

GameScene::~GameScene() {
    delete camera;
    delete sprite;
    delete material;
}