cone angle : 15,
rate of decay : 0,
constant attenuation : 1,
linear attenuation" : 0,
quadratic attenuation : 0
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vertex shader:
#version 130uniform mat4x4 projectionMatrix;uniform mat4x4 modelViewMatrix;uniform mat2x2 textureMatrix;uniform vec4 globalAmbient;uniform vec3 lightPosition; // in view spaceuniform vec4 lightAmbient;uniform vec4 lightDiffuse;uniform vec4 materialAmbient;uniform vec4 materialDiffuse;in vec4 position;in vec2 textureCoordinate;in vec3 normal;out vec2 vertexTextureCoordinate;out vec3 vertexNormal;out vec4 vertexGlobalAmbient;out vec3 vertexLightDirection;out vec3 vertexHalfVector;out float vertexLightDistance;out vec4 vertexAmbientColor;out vec4 vertexDiffuseColor;void main(){ vertexNormal = mat3x3(modelViewMatrix) * normal; // We assume no non-uniform scaling here // Compute the light direction gl_Position = modelViewMatrix * position; vec3 lightVector = lightPosition - gl_Position.xyz; vertexLightDirection = normalize( lightVector ); vertexLightDistance = length( lightVector ); vertexHalfVector = normalize( vertexLightDirection + gl_Position.xyz ); // Compute ambient and diffuse colors vertexGlobalAmbient = globalAmbient * materialAmbient; vertexAmbientColor = materialAmbient * lightAmbient; vertexDiffuseColor = materialDiffuse * lightDiffuse; gl_Position = projectionMatrix * gl_Position; vertexTextureCoordinate = textureMatrix * textureCoordinate;}fragment shader:
#version 130uniform sampler2D texture;uniform vec4 lightSpecular;uniform float lightConstantAttenuation;uniform float lightLinearAttenuation;uniform float lightQuadraticAttenuation;uniform vec3 lightDirection;uniform float lightConeAngleCosine;uniform uint lightRateOfDecay;uniform vec4 materialSpecular;uniform int materialShininess;in vec2 vertexTextureCoordinate;in vec3 vertexNormal;in vec4 vertexGlobalAmbient;in vec3 vertexLightDirection;in vec3 vertexHalfVector;in float vertexLightDistance;in vec4 vertexAmbientColor;in vec4 vertexDiffuseColor;out vec4 fragmentColor;void main(){ fragmentColor = vertexGlobalAmbient; vec3 normal = normalize( vertexNormal ); float normalDotLightDirection = max( dot( normal, normalize(vertexLightDirection) ), 0 ); if( normalDotLightDirection > 0 ) { float spotEffect = dot( normalize(lightDirection), normalize(-vertexLightDirection) ); if( spotEffect > lightConeAngleCosine ) { spotEffect = pow( spotEffect, lightRateOfDecay ); float attenuation = spotEffect / ( lightConstantAttenuation + lightLinearAttenuation * vertexLightDistance + lightQuadraticAttenuation * vertexLightDistance * vertexLightDistance ); fragmentColor += attenuation * ( vertexDiffuseColor * normalDotLightDirection + vertexAmbientColor ); vec3 halfVector = normalize( vertexHalfVector ); float normalDotHalfVector = max( dot(normal, halfVector), 0 ); fragmentColor += attenuation * materialSpecular * lightSpecular * pow( normalDotHalfVector, materialShininess ); } } vec4 texel = texture2D( texture, vertexTextureCoordinate ); fragmentColor *= texel; fragmentColor.a = texel.a;}