50 lines
1.3 KiB
Plaintext
Executable File
50 lines
1.3 KiB
Plaintext
Executable File
precision mediump float;
|
|
uniform sampler2D Texture;
|
|
uniform float Transparency;
|
|
|
|
|
|
varying vec3 position;
|
|
varying vec3 normal;
|
|
varying vec2 texCoord;
|
|
|
|
uniform vec3 lightPos;
|
|
uniform vec3 cameraPos;
|
|
uniform vec3 ambientLight;
|
|
uniform vec3 diffuseLight;
|
|
uniform vec3 specularLight;
|
|
uniform float specularPower;
|
|
|
|
void phongModel( vec3 norm, out vec3 ambAndDiff, out vec3 spec )
|
|
{
|
|
vec3 lightDirection = normalize(vec3(lightPos));
|
|
vec3 cameraDirection = normalize(vec3(cameraPos) - position);
|
|
vec3 lightReflection = reflect( -lightDirection, norm );
|
|
|
|
float sDotN = max( dot(lightDirection,norm), 0.0 );
|
|
|
|
vec3 diffuse = diffuseLight * sDotN;
|
|
ambAndDiff = ambientLight + diffuse;
|
|
|
|
spec = vec3(0.0);
|
|
if(sDotN > 0.0)
|
|
{
|
|
spec = specularLight * pow(max( dot(lightReflection, cameraDirection), 0.0 ), specularPower);
|
|
// spec is NAN, if dot == 0 && specularPower <= 0
|
|
}
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec3 ambAndDiff, spec;
|
|
vec3 norm = normalize(normal);
|
|
|
|
phongModel(norm, ambAndDiff, spec);
|
|
|
|
vec4 textureColor = texture2D(Texture, texCoord).rgba;
|
|
|
|
textureColor.r = textureColor.r * ambAndDiff.r + spec.r;
|
|
textureColor.g = textureColor.g * ambAndDiff.g + spec.g;
|
|
textureColor.b = textureColor.b * ambAndDiff.b + spec.b;
|
|
|
|
gl_FragColor = textureColor;
|
|
} |