利用者:Jwilkins/VFX/Common/Lighting

Lighting

Material

void GPU_set_basic_material_shininess(int shininess);
void GPU_set_basic_material_specular(const float specular[4]);

Lights

uniform mat3 b_NormalMatrix; // Transpose of upper 3x3 of b_ModelViewMatrix
uniform mat4 b_ModelViewMatrixInverse;

struct b_MaterialParameters {
    vec4  specular;  // Scm * Scli
    float shininess; // Srm
};

uniform b_MaterialParameters b_FrontMaterial;

struct b_LightSourceParameters {
    vec4  diffuse;              // Dcli
    vec4  specular;             // Scli
    vec4  position;             // Ppli

    vec3  spotDirection;        // Sdli
    float spotExponent;         // Srli
    float spotCutoff;           // Crli
                                // (range: [0.0,90.0], 180.0)

    float spotCosCutoff;        // Derived: cos(Crli)
                                // (range: [1.0,0.0],-1.0)

    float constantAttenuation;  // K0
    float linearAttenuation;    // K1
    float quadraticAttenuation; // K2
};

uniform b_LightSourceParameters b_LightSource[b_MaxLights];
uniform int b_LightCount;

typedef struct GPUbasiclight {
	float position[4];
	float diffuse [4];
	float specular[4];

	float constant_attenuation;
	float linear_attenuation;
	float quadratic_attenuation;

	float spot_direction[3];
	float spot_cutoff;
	float spot_exponent;
} GPUbasiclight;

Set lights and also applies appropriate transformations on the positions and spot directions.

void GPU_set_basic_lights(int light_count, GPUbasiclight lights[]);
int GPU_get_basic_lights(GPUbasiclight lights_out[]);

Set lights without transforming position or spot_direction. Suitable for restoring a backup copy of previous light state. Keeps position and spot position from getting transformed twice.

void GPU_restore_basic_lights(int light_count, GPUbasiclight lights[]);

A white directional light shining straight down with no attenuation or spot effects. Same as the default legacy OpenGL light number 0.

extern const GPUbasiclight GPU_DEFAULT_LIGHT;