Android Open Source - geoar-app Billiger Light Shader

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License

The source code is released under:

Apache License

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Java Source Code

/**
 * Copyright 2012 52North Initiative for Geospatial Open Source Software GmbH
 *// ww  w  .  j a  va2 s  .  c  o m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.n52.geoar.view.geoar.gl.mode;

public class BilligerLightShader extends FeatureShader {

  //@formatter:off
  private static final String vertexShader = "" +
      "uniform mat4 "+UNIFORM_MATRIX_MVP+";    \n" +               
      "uniform mat4 "+UNIFORM_MATRIX_MV+";    \n" +        
            
      "attribute vec4 "+ATTRIBUTE_POSITION+";    \n" +          
      "attribute vec4 "+ATTRIBUTE_COLOR+";    \n" +      
      "attribute vec4 "+ATTRIBUTE_NORMAL+";    \n" +          
      
      "varying vec3 vPosition;          \n" +          
      "varying vec4 vColor;            \n" +             
      "varying vec3 vNormal;            \n" +   
       
      "void main()                          \n" +                               
      "{                                    \n" +                           
          
        "vPosition = vec3("+UNIFORM_MATRIX_MV+" * "+ATTRIBUTE_POSITION+");            \n" +  
        "vColor = "+ATTRIBUTE_COLOR+";                          \n" +
        "vNormal = normalize(vec3("+UNIFORM_MATRIX_MV+" * "+ATTRIBUTE_NORMAL+"));    \n" +
        "gl_Position = "+UNIFORM_MATRIX_MVP+" * "+ATTRIBUTE_POSITION+";                  \n" +
        
      "}                                                         \n";
  
  private static final String fragmentShader = "" +
      "precision mediump float;               \n" + 
      "uniform vec3 "+UNIFORM_VEC3_LIGHTPOS+";       \n" + 

      "varying vec3 vPosition;              \n" +  
      "varying vec4 vColor;                  \n" + 
      "varying vec3 vNormal;                 \n" +

      "void main()                            \n" +
      "{                                      \n" +
//        "float distance = length("+UNIFORM_VEC3_LIGHTPOS+");         \n" +               

        "vec3 lightVector = normalize("+UNIFORM_VEC3_LIGHTPOS+");       \n" +         

        "float diffuse = max(dot(vNormal, lightVector), 0.0);      \n" +    
//        "diffuse = diffuse * (1.0 / (1.0 + (0.01 * distance)));      \n" +
        "diffuse = diffuse + 0.5;                      \n" +

        "gl_FragColor = diffuse * vColor;                \n" +                   
      "}                                        \n";
  //@formatter:on
  
  private static FeatureShader instance;
  
  public static FeatureShader getInstance(){
    if(instance == null){
      instance = new FeatureShader(vertexShader, fragmentShader);
    }
    return instance;
  }
  
  /** unused */
  private BilligerLightShader(String vertexShader, String fragmentShader) {
    super(vertexShader, fragmentShader);
  }

}

Java Source Code List