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struct vec2
{
float x;
float y;
};
const vec2 vertices[4] = { { +1.f, -1.f }, { +1.f, +1.f }, { -1.f, -1.f }, { -1.f, +1.f } };
const GLchar * vert = R"(
#version 150
#extension GL_ARB_explicit_attrib_location : require
layout (location = 0) in vec2 a_vertex;
out vec4 color;
void main()
{
gl_Position = vec4(a_vertex, 0.0, 1.0);
color = vec4(a_vertex * 0.5 + 0.5, 0.0, 1.0);
}
)";
const GLchar * frag = R"(
#version 150
#extension GL_ARB_explicit_attrib_location : require
layout (location = 0) out vec4 fragColor;
in vec4 color;
void main()
{
fragColor = color;
}
)";
GLuint vao;
GLuint quad;
GLuint program;
GLuint vs;
GLuint fs;
GLuint a_vertex;
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