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matabstrix
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Add colors

This commit is contained in:
Meoweg 2015-11-04 19:01:17 +00:00
parent 503626be4a
commit 7b6ab890be
1 changed files with 20 additions and 9 deletions
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29
main.cpp
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@ -27,22 +27,30 @@ static float delta_z = 0, delta_x = 0;
static const char vertex_shader_source[] = \
"attribute vec4 position; \n"\
"attribute vec3 color; \n"\
"varying vec4 f_color; \n"\
"uniform mat4 view_matrix; \n"\
"void main(void) { \n"\
" gl_Position = view_matrix * position; \n"\
" f_color = vec4(color, 1.0); \n"\
"} \n";
static const char fragment_shader_source[] = \
"void main(void) { \n"\
" gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0); \n"\
"} \n";
static const char fragment_shader_source[] = \
"precision lowp float; \n"\
"varying vec4 f_color; \n"\
"void main(void) { \n"\
" gl_FragColor = f_color; \n"\
"} \n";
static const GLfloat triangle_vertices[] = {
0.0, 0.0, 0.8,
-0.3, 0.0, 0.0,
0.3, 0.0, 0.0,
0.0, 0.0, 0.8, 1.0, 0.0, 0.0,
-0.3, 0.0, 0.0, 0.0, 1.0, 0.0,
0.3, 0.0, 0.0, 0.0, 0.0, 1.0,
};
static GLuint triangle;
@ -74,6 +82,7 @@ int main()
glAttachShader(program, vertex_shader);
glAttachShader(program, fragment_shader);
glBindAttribLocation(program, 0, "position");
glBindAttribLocation(program, 1, "color");
glLinkProgram(program);
glUseProgram(program);
@ -81,9 +90,11 @@ int main()
glGenBuffers(1, &triangle);
glBindBuffer(GL_ARRAY_BUFFER, triangle);
glBufferData(GL_ARRAY_BUFFER, 3 * 3 * sizeof(GLfloat), triangle_vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), reinterpret_cast<const GLvoid*>(0));
glBufferData(GL_ARRAY_BUFFER, 3 * 6 * sizeof(GLfloat), triangle_vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), reinterpret_cast<const GLvoid*>(0));
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), reinterpret_cast<const GLvoid*>(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glViewport(0, 0, 640, 480);