问带有纹理的卡通着色器

EN

#version 330

// Incoming per vertex... position and normal
in vec4 vVertex;
in vec3 vNormal;

smooth out float textureCoordinate;

uniform vec3    vLightPosition;
uniform mat4    mvpMatrix;
uniform mat4    mvMatrix;
uniform mat3    normalMatrix;


void main(void) 
    { 
    // Get surface normal in eye coordinates
    vec3 vEyeNormal = normalMatrix * vNormal;

    // Get vertex position in eye coordinates
    vec4 vPosition4 = mvMatrix * vVertex;
    vec3 vPosition3 = vPosition4.xyz / vPosition4.w;

    // Get vector to light source
    vec3 vLightDir = normalize(vLightPosition - vPosition3);

    // Dot product gives us diffuse intensity
    textureCoordinate = max(0.0, dot(vEyeNormal, vLightDir));

    // Don't forget to transform the geometry!
    gl_Position = mvpMatrix * vVertex;
    }

//
#version 330

uniform sampler1D colorTable;
out vec4 vFragColor;

smooth in float textureCoordinate;


void main(void)
   { 
   vFragColor = texture(colorTable, textureCoordinate);
   }