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