void blinnphong_app::startup()
{
load_shaders();
glGenBuffers(1, &uniforms_buffer);
glBindBuffer(GL_UNIFORM_BUFFER, uniforms_buffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(uniforms_block), NULL, GL_DYNAMIC_DRAW);
object.load("media/objects/sphere.sbm");
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
}
void multidrawindirect_app::startup()
{
int i;
load_shaders();
object.load("media/objects/asteroids.sbm");
glGenBuffers(1, &indirect_draw_buffer);
glBindBuffer(GL_DRAW_INDIRECT_BUFFER, indirect_draw_buffer);
glBufferData(GL_DRAW_INDIRECT_BUFFER,
NUM_DRAWS * sizeof(DrawArraysIndirectCommand),
NULL,
GL_STATIC_DRAW);
DrawArraysIndirectCommand * cmd = (DrawArraysIndirectCommand *)
glMapBufferRange(GL_DRAW_INDIRECT_BUFFER,
0,
NUM_DRAWS * sizeof(DrawArraysIndirectCommand),
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
for (i = 0; i < NUM_DRAWS; i++)
{
object.get_sub_object_info(i % object.get_sub_object_count(),
cmd[i].first,
cmd[i].count);
cmd[i].primCount = 1;
cmd[i].baseInstance = i;
}
glUnmapBuffer(GL_DRAW_INDIRECT_BUFFER);
glBindVertexArray(object.get_vao());
glGenBuffers(1, &draw_index_buffer);
glBindBuffer(GL_ARRAY_BUFFER, draw_index_buffer);
glBufferData(GL_ARRAY_BUFFER,
NUM_DRAWS * sizeof(GLuint),
NULL,
GL_STATIC_DRAW);
GLuint * draw_index =
(GLuint *)glMapBufferRange(GL_ARRAY_BUFFER,
0,
NUM_DRAWS * sizeof(GLuint),
GL_MAP_WRITE_BIT |
GL_MAP_INVALIDATE_BUFFER_BIT);
for (i = 0; i < NUM_DRAWS; i++)
{
draw_index[i] = i;
}
glUnmapBuffer(GL_ARRAY_BUFFER);
glVertexAttribIPointer(10, 1, GL_UNSIGNED_INT, 0, NULL);
glVertexAttribDivisor(10, 1);
glEnableVertexAttribArray(10);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glEnable(GL_CULL_FACE);
}