super balls

include/state.h

@@ -16,6 +16,7 @@ extern "C" {
     float ball_dx;
     float ball_dy;
     double launch_time;
+    bool super_ball;
   };
 
   #define MAX_BALLS 20

src/render.cpp

@@ -194,10 +194,19 @@ void render(mesh block_mesh,
 
     mat4x4 trans = a * t * ry * rx;
     mat3x3 normal_trans = submatrix(ry * rx, 3, 3);
+
+    vec4 base_color = vec4(0.5f, 0.5f, 0.5f, 1.0f);
+    if (ball.super_ball) {
       float hue = state->time - ball.launch_time;
       hue = hue - floorf(hue);
       vec3 c = hsv_to_rgb(hue, 1.0f, 1.0f);
-    vec4 base_color = vec4(c.x, c.y, c.z, 1.0f);
+      base_color = vec4(c.x, c.y, c.z, 1.0f);
+    } else if (0) {
+      float hue = sin(ball.launch_time) * 0.5 - 0.5;
+      hue = hue - floorf(hue);
+      vec3 c = hsv_to_rgb(hue, 1.0f, 1.0f);
+      base_color = vec4(c.x, c.y, c.z, 1.0f) * 0.5f;
+    }
 
     glBindBuffer(GL_ARRAY_BUFFER, ball_mesh.vtx);
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ball_mesh.idx);

src/update.cpp

@@ -92,6 +92,8 @@ void launch_ball(struct game_state * state, double time)
   ball.ball_dy = -d.y;
   ball.launch_time = time;
 
+  ball.super_ball = state->balls_launched % 5 == 4;
+
   state->balls_launched += 1;
   state->intro_shown = true;
 }
@@ -154,6 +156,7 @@ void update_ball(struct game_state * state, struct ball_state& ball, double time
       struct collision_data cd;
       bool collided = aabb_circle_collision(block_position, ball_position, block_bounds, &cd);
       if (collided) {
+        if (ball.super_ball == 0)
           ball_collision_response(ball, cd);
         state->blocks[block_ix].destroyed_time = time;
       }