sfw/render/color_material.h

#ifndef COLOR_MATERIAL_H
#define COLOR_MATERIAL_H

#include "material.h"
#include "glm/vec4.hpp"

#include "camera.h"

#include "./glm/gtc/type_ptr.hpp"

class ColorMaterial : public Material {

public:
    int get_material_id() {
        return 2;
    }

    void bind_uniforms() {
        glUniformMatrix4fv(projection_matrix_location, 1, GL_FALSE, glm::value_ptr(Camera::current_camera->projection_matrix));
        glUniformMatrix4fv(model_view_matrix_location, 1, GL_FALSE, glm::value_ptr(Camera::current_camera->model_view_matrix));
    }

    void setup_uniforms() {
        projection_matrix_location = get_uniform("u_proj_matrix");
        model_view_matrix_location = get_uniform("u_model_view_matrix");
    }

    const GLchar** get_vertex_shader_source() {
        static const GLchar *vertex_shader_source[] = {
            "uniform mat4 u_proj_matrix;\n"
            "uniform mat4 u_model_view_matrix;\n"
            "\n"
            "attribute vec4 a_position;\n"
            "attribute vec4 a_color;\n"
            "\n"
            "varying vec4 v_color;\n"
            "\n"
            "void main() {\n"
            "   v_color = a_color;\n"
            "   gl_Position = u_proj_matrix * u_model_view_matrix * a_position;\n"
            "}\n"
        };

        return vertex_shader_source;
    }

    const GLchar** get_fragment_shader_source() {
        static const GLchar *fragment_shader_source[] = {
            "precision mediump float;"
            "varying vec4 v_color;\n"
            "\n"
            "void main() { gl_FragColor = v_color; }\n"
        };

        return fragment_shader_source;
    }

    ColorMaterial() {
        color = glm::vec4(1, 1, 1, 1);
    }

    GLint projection_matrix_location;
    GLint model_view_matrix_location;

    glm::vec4 color;
};

#endif