Blood particles

game/components.h

@@ -115,6 +115,32 @@ static ParticleEmitter GET_FIREBALL_EMITTER() {
             .data.blend = BLEND_ADDITIVE
     };
 }
+static ParticleEmitter GET_BLOOD_EMITTER() {
+    return (ParticleEmitter) {
+        .emitterLifetime = 0.3f,
+        .data.emmitRate = 1.8f,
+        .data.minOffset = { -3.6f, -3.6f },
+        .data.maxOffset = { 3.6f, 3.6f },
+        .data.minStartVel = { 4.5f, 7.3f },
+        .data.maxStartVel = { 2.5f, 3.3f },
+        .data.minEndVel = { -0.8f, 1.2f },
+        .data.maxEndVel = { -0.4f, 1.6f },
+        .data.minStartSize = 2.45f,
+        .data.maxStartSize = 3.3f,
+        .data.minEndSize = 0.8f,
+        .data.maxEndSize = 1.1f,
+        .data.minStartRotSpeed = 8.0f,
+        .data.maxStartRotSpeed = 14.0f,
+        .data.minEndRotSpeed = 4.5f,
+        .data.maxEndRotSpeed = 6.2f,
+        .data.startColor = { 210, 0, 0, 255 },
+        .data.endColor = { 110, 10, 10, 32 },
+        .data.minLifetime = 0.23,
+        .data.maxLifetime = 0.37,
+        .data.blend = BLEND_ALPHA,
+        .data.tileID = getParticleTypeTile(PARTICLE_SMALL_SQUARE),
+    };
+}
 
 typedef struct Particle {
     Vector2 pos;

game/main.c

@@ -464,6 +464,7 @@ static void drawOverScreen(Color c) {
 
     DrawRectangle(0, 0, width, height, c);
 }
+static ParticleEmitter editedEmitter;
 static void renderGame(Game *game, float dt) {
     ClearBackground(RAYWHITE);
     BeginMode2D(game->camera);
@@ -568,9 +569,15 @@ static void renderGame(Game *game, float dt) {
 
     EndMode2D();
 
+    static bool firstRun = true;
+    if (firstRun) {
+        editedEmitter = GET_BLOOD_EMITTER();
+        firstRun = false;
+    }
+
     InputState *input = ecs_singleton_get_mut(ECS, InputState);
     if (IsKeyReleased(KEY_SPACE)) {
-        ParticleEmitter emitter = GET_FIREBALL_EMITTER();
+        ParticleEmitter emitter = editedEmitter;
         emitter.pos = input->mouseWorld;
         emitter.targetParticles = ecs_id(ParticleLayer1);
         ecs_entity_t e = entityCreateEmpty();
@@ -715,11 +722,14 @@ void imguiRender(float dt, void *userData) {
     }
     igText("Input state: %s", inputState);
     if (igCollapsingHeader_TreeNodeFlags("ParticleEditor", 0)) {
-        static ParticleEmitter emitter = {0.0f};
-        emitter.data.tileID = getParticleTypeTile(PARTICLE_CIRCLE);
-        emitter.data.blend = BLEND_ADDITIVE;
-        struct ParticleEmitterData *data = &emitter.data;
-        igSliderFloat2("Pos", &emitter.pos.x, 0.0f, 1000.0f, "%.2f", 0);
+        struct ParticleEmitterData *data = &editedEmitter.data;
+        igSliderFloat("EmitterLifetime", &editedEmitter.emitterLifetime, 0.0f, 10.0f, "%.2f", 0);
+        igSliderFloat2("Pos", &editedEmitter.pos.x, 0.0f, 1000.0f, "%.2f", 0);
+
+        igSliderFloat("emmitRate", &data->emmitRate, 0.0f, 10.0f, "%.2f", 0);
+        igSliderFloat("emmitVarianceScl", &data->emmitVariance, 0.0f, 10.0f, "%.2f", 0);
+        igSliderFloat2("emmitVariance", &data->emmitVarianceMin, -10.0f, 10.0f, "%.2f", 0);
+
         igSliderFloat2("minOffset", &data->minOffset.x, -50.0f, 50.0f, "%.2f", 0);
         igSliderFloat2("maxOffset", &data->maxOffset.x, -50.0f, 50.0f, "%.2f", 0);
 
@@ -760,10 +770,31 @@ void imguiRender(float dt, void *userData) {
 
         igSliderFloat("minLifetime", &data->minLifetime, 0.0f, 6.0f, "%.2f", 0);
         igSliderFloat("maxLifetime", &data->maxLifetime, 0.0f, 6.0f, "%.2f", 0);
-        Particle particle = spawnParticle(&emitter);
-        //ecs_entity_t e = entityCreateEmpty();
-        //ecs_set_ptr(ECS, e, ParticleLayer1, &particle);
-    }
+
+#define NUM_BLEND_MODES 6
+        const char *blendModeNames[NUM_BLEND_MODES] = {
+                "Alpha",
+                "Additive",
+                "Multiplied",
+                "AddColors",
+                "SubtractColors",
+                "AlphaPremultiply"
+        };
+        int blendMode = data->blend;
+        igCombo_Str_arr("BlendMode", &blendMode, blendModeNames, NUM_BLEND_MODES, 0);
+        data->blend = blendMode;
+#undef NUM_BLEND_MODES
+#define NUM_SHAPES 3
+        const char *typeNames[NUM_SHAPES] = {
+                "Circle",
+                "SmallSquare",
+                "Square",
+        };
+        int type = getParticleType(data->tileID);
+        igCombo_Str_arr("ParticleType", &type, typeNames, NUM_SHAPES, 0);
+        data->tileID = getParticleTypeTile(type);
+#undef NUM_SHAPES
+    };
     if (igCollapsingHeader_TreeNodeFlags("Selection", 0)) {
         switch (input->state) {
             case INPUT_SELECTED_UNITS:

game/systems/s_event.c

@@ -12,6 +12,16 @@ void damageEvent(ecs_entity_t entity, DamageEvent event) {
     Health *health = ecs_get_mut(ECS, entity, Health);
     health->hp -= event.amount;
 
+    Vector2 center = {
+            event.hitbox.x + event.hitbox.width * 0.5f,
+            event.hitbox.y + event.hitbox.height * 0.5f,
+    };
+    ecs_entity_t bloodEmitterEntity = entityCreateEmpty();
+    ParticleEmitter bloodEmitter = GET_BLOOD_EMITTER();
+    bloodEmitter.pos = center;
+    bloodEmitter.targetParticles = ecs_id(ParticleLayer1);
+    ecs_set_ptr(ECS, bloodEmitterEntity, ParticleEmitter, &bloodEmitter);
+
     Vector2 pos = {
             event.hitbox.x + event.hitbox.width * 0.5f + randFloatRange(-2, 2),
             event.hitbox.y + randFloatRange(2, 4)