void GFX_ortho( float left, float right, float bottom, float top, float clip_start, float clip_end )
{
switch( gfx.matrix_mode )
{
case MODELVIEW_MATRIX:
{
mat4_ortho( GFX_get_modelview_matrix(), left, right, bottom, top, clip_start, clip_end );
break;
}
case PROJECTION_MATRIX:
{
mat4_ortho( GFX_get_projection_matrix(), left, right, bottom, top, clip_start, clip_end );
break;
}
case TEXTURE_MATRIX:
{
mat4_ortho( GFX_get_texture_matrix(), left, right, bottom, top, clip_start, clip_end );
break;
}
}
}
void display_step(struct s_vm* vm, t_display* display)
{
t_mat4 screen;
glfwGetFramebufferSize(display->window, &display->frame_buffer_width, &display->frame_buffer_height);
display->frame_buffer_ratio =
(float)display->frame_buffer_width / (float)display->frame_buffer_height;
mat4_ident(&screen);
mat4_ortho(&screen, 0.0f,
(float)display->frame_buffer_width * 0.25f,
(float)display->frame_buffer_height * 0.25f,
0.0f, -100.0f, 100.0f);
display_update_camera(display);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, display->frame_buffer_width, display->frame_buffer_height);
glEnable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
display_render_memory(vm, display);
display_render_io_read(vm, display);
display_render_io_write(vm, display);
glDisable(GL_BLEND);
display_render_io_process(vm, display);
glEnable(GL_BLEND);
// display_text_render(display->texts, &screen);
// display_text_clear(display->texts);
glfwSwapBuffers(display->window);
glfwPollEvents();
}
void camera_update(camera_t *camera)
{
float size;
camera->fovy = 20.;
if (camera->move_to_target) {
camera->move_to_target = !vec3_ilerp_const(
&camera->ofs, vec3_neg(camera->target), camera->dist / 128);
}
// Update the camera mats
camera->view_mat = mat4_identity;
mat4_itranslate(&camera->view_mat, 0, 0, -camera->dist);
mat4_imul_quat(&camera->view_mat, camera->rot);
mat4_itranslate(&camera->view_mat,
camera->ofs.x, camera->ofs.y, camera->ofs.z);
if (camera->ortho) {
size = camera->dist;
camera->proj_mat = mat4_ortho(
-size, +size,
-size / camera->aspect, +size / camera->aspect,
0, 1000);
} else {
camera->proj_mat = mat4_perspective(
camera->fovy, camera->aspect, 1, 1000);
}
}
void proj_tests(void){
mat4_t m = mat4_look_at(vec4_new(0, 0, 5, 0),
vec4_new(0, 0, 0, 0), vec4_new(0, 1, 0, 0));
printf("Look at matrix:\n");
mat4_print(m);
m = mat4_ortho(-1, 1, -1, 1, 1, 100);
printf("ortho matrix:\n");
mat4_print(m);
m = mat4_perspective(90, 1, 1, 100);
printf("perspective:\n");
mat4_print(m);
}
void display_update_camera(t_display* display)
{
float width = display->frame_buffer_width * display->display_zoom * 0.5f;
float height = display->frame_buffer_height * display->display_zoom * 0.5f;
mat4_ident(&display->projection_view);
mat4_ortho(&display->projection_view,
display->display_center_x - width,
display->display_center_x + width,
display->display_center_y + height,
display->display_center_y - height,
0.0f, 100.0f);
}
