void shal_draw_elliptical_arc(float cx,
float cy,
float rx,
float ry,
float start_theta,
float delta_theta,
float color_r,
float color_g,
float color_b,
float color_a,
float thickness)
{
ALLEGRO_COLOR color;
color.r = color_r;
color.g = color_g;
color.b = color_b;
color.a = color_a;
return al_draw_elliptical_arc(cx,
cy,
rx,
ry,
start_theta,
delta_theta,
color,
thickness);
}
static void TransformationsPrimitives(int mode)
{
float t = al_get_time();
if (mode == INIT) {
} else if (mode == LOGIC) {
Theta += Speed;
al_build_transform(&MainTrans, ScreenW / 2, ScreenH / 2, sinf(t / 5), cosf(t / 5), Theta);
} else if (mode == DRAW) {
float points[8] = {
-300, -200,
700, 200,
-700, 200,
300, -200
};
if (Blend)
al_set_blender(ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_ONE);
else
al_set_blender(ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_ZERO);
al_use_transform(&MainTrans);
al_draw_line(-300, -200, 300, 200, al_map_rgba_f(0, 0.5, 0.5, 1), Thickness);
al_draw_triangle(-150, -250, 0, 250, 150, -250, al_map_rgba_f(0.5, 0, 0.5, 1), Thickness);
al_draw_rectangle(-300, -200, 300, 200, al_map_rgba_f(0.5, 0, 0, 1), Thickness);
al_draw_rounded_rectangle(-200, -125, 200, 125, 50, 100, al_map_rgba_f(0.2, 0.2, 0, 1), Thickness);
al_draw_ellipse(0, 0, 300, 150, al_map_rgba_f(0, 0.5, 0.5, 1), Thickness);
al_draw_elliptical_arc(-20, 0, 300, 200, -ALLEGRO_PI / 2, -ALLEGRO_PI, al_map_rgba_f(0.25, 0.25, 0.5, 1), Thickness);
al_draw_arc(0, 0, 200, -ALLEGRO_PI / 2, ALLEGRO_PI, al_map_rgba_f(0.5, 0.25, 0, 1), Thickness);
al_draw_spline(points, al_map_rgba_f(0.1, 0.2, 0.5, 1), Thickness);
al_draw_pieslice(0, 25, 150, ALLEGRO_PI * 3 / 4, -ALLEGRO_PI / 2, al_map_rgba_f(0.4, 0.3, 0.1, 1), Thickness);
al_use_transform(&Identity);
}
}
