stuff

game/inc/suic_lighting.h

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+#pragma once
+#include "suic_math.h"
+#include <stdint.h>
+
+/**
+ * Lighting system API.
+ * Supports directional lighting, shadows, ambient occlusion, and Phong shading.
+ */
+
+typedef struct SuicColor {
+    uint8_t r, g, b, a;
+} SuicColor;
+
+typedef struct SuicDirectionalLight {
+    SuicVec3 direction;
+    SuicVec3 color;
+    float intensity;
+    float ambientIntensity;
+    float shadowBias;
+    float shadowIntensity;
+} SuicDirectionalLight;
+
+/* Light creation */
+SuicDirectionalLight suic_light_create(float dir_x, float dir_y, float dir_z,
+                                        float intensity, float ambient);
+SuicDirectionalLight suic_light_create_default(void);
+
+/* Basic lighting */
+SuicColor suic_light_apply(SuicColor base, SuicVec3 normal, SuicDirectionalLight* light);
+
+/* Lighting with shadows */
+SuicColor suic_light_apply_shadows(SuicColor base, SuicVec3 normal, SuicVec3 worldPos,
+                                   SuicDirectionalLight* light);
+
+/* Phong lighting (with specular) */
+SuicColor suic_light_apply_phong(SuicColor base, SuicVec3 normal, SuicVec3 worldPos,
+                                 SuicVec3 camPos, SuicDirectionalLight* light);
+
+/* Shadow calculations */
+float suic_shadow_factor(SuicVec3 worldPos, SuicVec3 lightDir, float maxDist);
+float suic_shadow_temporal(SuicVec3 worldPos, float timePhase);
+
+/* Ambient occlusion */
+float suic_ao_calculate(SuicVec3 worldPos, SuicVec3 normal);