pico_gfx: minor cleanup

examples_pico_gfx/particles.c

@@ -251,17 +251,9 @@ int main(int argc, char *argv[])
  {
  .pos = { win_w / 2.f, win_h / 2.f },
  .color = { 0.f, 0.f, 0.f, 1.f },
- //.vel = { 0, 50 }
  };
 
- if (i % 3 == 0)
- particle.color[0] = 1.f;
-
- if (i % 3 == 1)
- particle.color[1] = 1.f;
-
- if (i % 3 == 2)
- particle.color[2] = 1.f;
+ particle.color[i % 3] = 1.f;
 
  state.particles[state.particle_count] = particle;
  state.vel[state.particle_count] = (vel_t){ cosf(angle) * 10, -sinf(angle) * 50 };
@@ -271,17 +263,9 @@ int main(int argc, char *argv[])
  // Update particle positions
  for (int i = 0; i < state.particle_count; i++)
  {
- //state.particles[i].pos[1] += state.particles[i].vel[1] * delta;*/
  state.particles[i].pos[0] += state.vel[i].x * delta;
  state.particles[i].pos[1] += state.vel[i].y * delta;
-
- // Bounce back from 'ground'
- /*if (state.pos[i].Y < -2.0f) {
- state.pos[i].Y = -1.8f;
- state.vel[i].Y = -state.vel[i].Y;
- state.vel[i].X *= 0.8f; state.vel[i].Y *= 0.8f; state.vel[i].Z *= 0.8f;
- }*/
- }//*/
+ }
 
  pg_update_buffer(instance_buffer, state.particles, state.particle_count);