LYGIA Shader Library

Dependencies:

• lygia/v1.2.0/lighting/light/directional.glsl
• lygia/v1.2.0/lighting/light/point.glsl
• lygia/v1.2.0/lighting/shadow.glsl

Check it on Github

#ifndef FNC_LIGHT_NEW
#define FNC_LIGHT_NEW

#if defined(LIGHT_DIRECTION) 
void lightNew(out LightDirectional _L) {
    #ifdef LIGHT_DIRECTION
    _L.direction    = normalize(LIGHT_DIRECTION);
    #elif defined(LIGHT_POSITION)
    _L.direction    = normalize(LIGHT_POSITION);
    #else
    _L.direction    = normalize(vec3(0.0, 1.0, -1.0));
    #endif

    #ifdef LIGHT_COLOR
    _L.color        = LIGHT_COLOR;
    #else 
    _L.color        = vec3(1.0);
    #endif

    #ifdef LIGHT_INTENSITY
    _L.intensity    = LIGHT_INTENSITY;
    #else
    _L.intensity    = 1.0;
    #endif

    #if defined(LIGHT_SHADOWMAP) && defined(LIGHT_SHADOWMAP_SIZE) && defined(LIGHT_COORD)
    _L.intensity *= shadow(LIGHT_SHADOWMAP, vec2(LIGHT_SHADOWMAP_SIZE), (LIGHT_COORD).xy, (LIGHT_COORD).z);
    #endif
}

LightDirectional LightDirectionalNew() { LightDirectional l; lightNew(l); return l; }
#endif

#if defined(LIGHT_POSITION)

void lightNew(out LightPoint _L) {
    #if defined(SURFACE_POSITION)
    _L.position     = LIGHT_POSITION - SURFACE_POSITION.xyz;
    #else
    _L.position     = LIGHT_POSITION;
    #endif

    _L.color        = LIGHT_COLOR;
    _L.intensity    = LIGHT_INTENSITY;

    #ifdef LIGHT_COLOR
    _L.color        = LIGHT_COLOR;
    #else 
    _L.color        = vec3(1.0);
    #endif

    #ifdef LIGHT_INTENSITY
    _L.intensity    = LIGHT_INTENSITY;
    #else
    _L.intensity    = 1.0;
    #endif

    #ifdef LIGHT_FALLOFF
    _L.falloff      = LIGHT_FALLOFF;
    #else
    _L.falloff      = 0.0;
    #endif

    #if defined(LIGHT_SHADOWMAP) && defined(LIGHT_SHADOWMAP_SIZE) && defined(LIGHT_COORD)
    _L.intensity *= shadow(LIGHT_SHADOWMAP, vec2(LIGHT_SHADOWMAP_SIZE), (LIGHT_COORD).xy, (LIGHT_COORD).z);
    #endif
}

LightPoint LightPointNew() {
    LightPoint l;
    lightNew(l);
    return l;
}
#endif

#endif