Add particles!

game/main.c

@@ -16,6 +16,7 @@
 
 #include "pathfinding.h"
 #include "sounds.h"
+#include "entity_factory.h"
 
 // Constants
 const char *GAME_DATA_SAVE_PATH = "game_data.ini";
@@ -192,6 +193,12 @@ bool init(void *userData) {
                 { ecs_id(TextureRegion) }
         },
     });
+    game->particles0Query = ecs_query(ECS, {
+        .filter.terms = { { ecs_id(ParticleLayer0) } }
+    });
+    game->particles1Query = ecs_query(ECS, {
+        .filter.terms = { { ecs_id(ParticleLayer1) } }
+    });
 
     {
         ECS_COMPONENT_DEFINE(ECS, InputState);
@@ -354,6 +361,8 @@ void deinit(void *userData) {
     // Destroy queries
     ecs_query_fini(input->queries.selected);
     ecs_query_fini(game->drawQuery);
+    ecs_query_fini(game->particles0Query);
+    ecs_query_fini(game->particles1Query);
 
     Game gameCopy = *game;
     InputState inputCopy = *input;
@@ -530,6 +539,22 @@ static void renderGame(Game *game, float dt) {
         DrawTexturePro(tex, draw.src, draw.dst, draw.origin, draw.rotation, c);
     }
     bzTileMapClearCollisionLayer(&game->map, COLL_LAYER_TRANSPARENCY);
+
+    // Draw particle layer 1
+    it = ecs_query_iter(ECS, game->particles1Query);
+    ecs_defer_begin(ECS);
+    while (ecs_iter_next(&it)) {
+        Particle *particle = ecs_field(&it, Particle, 1);
+        for (i32 i = 0; i < it.count; i++) {
+            DrawCircleV(particle[i].pos, 2.0f, RED);
+            if (updateParticle(tex, &particle[i], dt))
+                ecs_delete(ECS, it.entities[i]);
+        }
+    }
+    ecs_defer_end(ECS);
+
+
+#if 0
     Vector2 target = GetMousePosition();
     target = GetScreenToWorld2D(target, game->camera);
     static f32 elapsed = 0;
@@ -543,7 +568,6 @@ static void renderGame(Game *game, float dt) {
     elapsed += dt * 2;
     elapsed = Clamp(elapsed, 0, 1.0f);
     attack = false;
-#if 0
     if (worker && false) {
         Position *pos = ecs_get_mut(ECS, worker, Position);
         DrawCircle(pos->x, pos->y, 2.0f, BLUE);
@@ -709,6 +733,58 @@ void imguiRender(float dt, void *userData) {
             break;
     }
     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);
+        igSliderFloat2("minOffset", &data->minOffset.x, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat2("maxOffset", &data->maxOffset.x, -50.0f, 50.0f, "%.2f", 0);
+
+        igSliderFloat2("minStartVel", &data->minStartVel.x, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat2("maxStartVel", &data->maxStartVel.x, -50.0f, 50.0f, "%.2f", 0);
+
+        igSliderFloat2("minEndVel", &data->minEndVel.x, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat2("maxEndVel", &data->maxEndVel.x, -50.0f, 50.0f, "%.2f", 0);
+
+        igSliderFloat("minStartSize", &data->minStartSize, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat("maxStartSize", &data->maxStartSize, -50.0f, 50.0f, "%.2f", 0);
+
+        igSliderFloat("minEndSize", &data->minEndSize, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat("maxEndSize", &data->maxEndSize, -50.0f, 50.0f, "%.2f", 0);
+
+        igSliderFloat("minStartRotSpeed", &data->minStartRotSpeed, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat("maxStartRotSpeed", &data->maxStartRotSpeed, -50.0f, 50.0f, "%.2f", 0);
+
+        igSliderFloat("minEndRotSpeed", &data->minEndRotSpeed, -50.0f, 50.0f, "%.2f", 0);
+        igSliderFloat("maxEndRotSpeed", &data->maxEndRotSpeed, -50.0f, 50.0f, "%.2f", 0);
+
+#define igColor(label, color)                                       \
+    do {                                                            \
+                                                                    \
+        float cols[4] = { color.r / 255.0f, color.g / 255.0f,       \
+                          color.b / 255.0f, color.a / 255.0f };     \
+        igColorEdit4(label, cols, 0);                               \
+        color.r = cols[0] * 255.0f;                                 \
+        color.g = cols[1] * 255.0f;                                 \
+        color.b = cols[2] * 255.0f;                                 \
+        color.a = cols[3] * 255.0f;                                 \
+    } while (0)
+
+
+        igColor("minStartColor", data->minStartColor);
+        igColor("maxStartColor", data->maxStartColor);
+        igColor("minEndColor", data->minEndColor);
+        igColor("maxEndColor", data->maxEndColor);
+#undef igColor
+
+        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);
+    }
     if (igCollapsingHeader_TreeNodeFlags("Selection", 0)) {
         switch (input->state) {
             case INPUT_SELECTED_UNITS: