Add Floaty text particles

game/systems/s_animation.c

@@ -6,6 +6,49 @@
 #include <raymath.h>
 #include <stdlib.h>
 
+static inline int lerpInt(int start, int end, f32 alpha)
+{
+    float result = start + alpha * (end - start);
+    return result;
+}
+static inline Color lerpColor(Color start, Color end, f32 alpha) {
+    return (Color) {
+        .r = lerpInt(start.r, end.r, alpha),
+        .g = lerpInt(start.g, end.g, alpha),
+        .b = lerpInt(start.b, end.b, alpha),
+        .a = lerpInt(start.a, end.a, alpha),
+    };
+}
+
+void renderFloatyTextParticle(ecs_iter_t *it) {
+    Game *game = ecs_singleton_get_mut(ECS, Game);
+    FloatyTextParticle *floaty = ecs_field(it, FloatyTextParticle, 1);
+    f32 dt = GetFrameTime();
+
+    for (i32 i = 0; i < it->count; i++) {
+        ecs_entity_t entity = it->entities[i];
+
+        f32 alpha = floaty[i].elapsed / floaty[i].duration;
+        Color color = lerpColor(floaty[i].color, floaty[i].targetColor, alpha);
+        Font font = game->font;
+        // Shadow
+        Vector2 shadowPos = floaty[i].pos;
+        shadowPos.x += 0.4f;
+        shadowPos.y += 0.4f;
+        Color shadowColor = DARKGRAY;
+        shadowColor.a = color.a;
+        DrawTextEx(font, floaty[i].text, shadowPos, floaty[i].txtSize, 1.0f, shadowColor);
+        DrawTextEx(font, floaty[i].text, floaty[i].pos, floaty[i].txtSize, 1.0f, color);
+
+        // pos += speed * dt
+        floaty[i].pos = Vector2Add(floaty[i].pos, Vector2Scale(floaty[i].speed, dt));
+
+        floaty[i].elapsed += dt;
+        if (floaty[i].elapsed >= floaty[i].duration)
+            ecs_delete(ECS, entity);
+    }
+}
+
 void updateParticleEmitter(ecs_iter_t *it) {
     ParticleEmitter *emitter = ecs_field(it, ParticleEmitter, 1);
     f32 dt = GetFrameTime();
@@ -29,12 +72,6 @@ void updateParticleEmitter(ecs_iter_t *it) {
     }
 }
 
-static inline int lerpInt(int start, int end, int amount)
-{
-    float result = start + amount*(end - start);
-
-    return result;
-}
 bool updateParticle(const Texture2D tex, Particle *particle, f32 dt) {
     f32 alpha = particle->elapsed / particle->lifetime;
 
@@ -43,12 +80,7 @@ bool updateParticle(const Texture2D tex, Particle *particle, f32 dt) {
     f32 rot = Lerp(particle->startRotSpeed, particle->endRotSpeed, alpha);
     Color startC = particle->startColor;
     Color endC = particle->endColor;
-    Color color = {
-            .r = lerpInt(startC.r, endC.r, alpha),
-            .g = lerpInt(startC.g, endC.g, alpha),
-            .b = lerpInt(startC.b, endC.b, alpha),
-            .a = lerpInt(startC.a, endC.a, alpha)
-    };
+    Color color = lerpColor(startC, endC, alpha);
 
     BeginBlendMode(particle->blend);
     f32 hSize = size * 0.5f;