void deferred_renderer_render_light(light* l) {
matrix_4x4 viewm = camera_view_matrix(CAMERA);
matrix_4x4 projm = camera_proj_matrix(CAMERA, graphics_viewport_ratio() );
vector4 light_pos = v4(l->position.x, l->position.y, l->position.z, 1);
light_pos = m44_mul_v4(viewm, light_pos);
light_pos = m44_mul_v4(projm, light_pos);
light_pos = v4_div(light_pos, light_pos.w);
glUseProgram(shader_program_handle(PROGRAM_UI));
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, graphics_viewport_width(), graphics_viewport_height(), 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
float top = ((-light_pos.y + 1) / 2) * graphics_viewport_height() - 8;
float bot = ((-light_pos.y + 1) / 2) * graphics_viewport_height() + 8;
float left = ((light_pos.x + 1) / 2) * graphics_viewport_width() - 8;
float right = ((light_pos.x + 1) / 2) * graphics_viewport_width() + 8;
texture* lightbulb = asset_load_get("$CORANGE/ui/lightbulb.dds");
glActiveTexture(GL_TEXTURE0 + 0 );
glBindTexture(GL_TEXTURE_2D, texture_handle(lightbulb));
glEnable(GL_TEXTURE_2D);
glUniform1i(glGetUniformLocation(shader_program_handle(PROGRAM_UI), "diffuse"), 0);
glUniform1f(glGetUniformLocation(shader_program_handle(PROGRAM_UI), "alpha_test"), 0.5);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(left, top, -light_pos.z);
glTexCoord2f(0.0f, 1.0f); glVertex3f(left, bot, -light_pos.z);
glTexCoord2f(1.0f, 1.0f); glVertex3f(right, bot, -light_pos.z);
glTexCoord2f(1.0f, 0.0f); glVertex3f(right, top, -light_pos.z);
glEnd();
glActiveTexture(GL_TEXTURE0 + 0 );
glDisable(GL_TEXTURE_2D);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glUseProgram(0);
}
void particles_render() {
#ifdef OPEN_GL_CPU
#ifndef CPU_ONLY
kernel_memory_read(k_particle_positions, sizeof(vector4) * particle_count, particle_positions);
#endif
glBindBuffer(GL_ARRAY_BUFFER, positions_buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(vector4) * particle_count, particle_positions, GL_DYNAMIC_COPY);
#ifndef CPU_ONLY
kernel_memory_read(k_particle_randoms, sizeof(vector4) * particle_count, particle_randoms);
#endif
glBindBuffer(GL_ARRAY_BUFFER, randoms_buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(vector4) * particle_count, particle_randoms, GL_DYNAMIC_COPY);
#endif
camera* cam = entity_get("camera");
matrix_4x4 viewm = camera_view_matrix(cam);
matrix_4x4 projm = camera_proj_matrix(cam, graphics_viewport_ratio() );
m44_to_array(viewm, view_matrix);
m44_to_array(projm, proj_matrix);
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(view_matrix);
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(proj_matrix);
glBindBuffer(GL_ARRAY_BUFFER, positions_buffer);
glVertexPointer(4, GL_FLOAT, 0, (void*)0);
glEnableClientState(GL_VERTEX_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, randoms_buffer);
glColorPointer(4, GL_FLOAT, 0, (void*)0);
glEnableClientState(GL_COLOR_ARRAY);
glDrawArrays(GL_POINTS, 0, particle_count);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
}
static void deferred_renderer_setup_camera() {
matrix_4x4 viewm = camera_view_matrix(CAMERA);
matrix_4x4 projm = camera_proj_matrix(CAMERA, graphics_viewport_ratio() );
m44_to_array(viewm, VIEW_MATRIX);
m44_to_array(projm, PROJ_MATRIX);
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(VIEW_MATRIX);
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(PROJ_MATRIX);
matrix_4x4 lviewm = light_view_matrix(SHADOW_LIGHT);
matrix_4x4 lprojm = light_proj_matrix(SHADOW_LIGHT);
m44_to_array(lviewm, LIGHT_VIEW_MATRIX);
m44_to_array(lprojm, LIGHT_PROJ_MATRIX);
}
mat4 camera_proj_matrix(camera* c) {
return mat4_perspective(c->fov, c->near_clip, c->far_clip, graphics_viewport_ratio());
}