Android Open Source - Schooner-3D Cel Shaded Material

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2012 Dan Mercer/*from www  .j av  a2 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 com.supermercerbros.gameengine.material;

import com.supermercerbros.gameengine.engine.shaders.Material;
import com.supermercerbros.gameengine.engine.shaders.ShaderLib;
import com.supermercerbros.gameengine.objects.GameObject;
import com.supermercerbros.gameengine.shaders.ProgramSource;
import com.supermercerbros.gameengine.texture.Texture;

/**
 * This is a basic textured material. Use it for smooth-shaded, uv-mapped
 * triangles.
 */
public class CelShadedMaterial extends Material {
  private final static int STRIDE = 8;
  
  private static final String VERT_VARS =
      "attribute vec3 a_pos;" +
      "attribute vec3 a_normal;" +
      "attribute vec2 a_mtl;" + // Stores UV coords
          
      "uniform mat4 u_viewProj;" +
      "uniform mat4 u_model;" + 
      "uniform vec3 u_lightVec;";
  
  private static final String VERT_MAIN =
      "gl_Position = (u_viewProj * u_model) * vec4(a_pos, 1.0);" +
      
      "v_tc = vec2(a_mtl.x, 1.0 - a_mtl.y);" +
      
      "vec3 normal = mat3(u_model) * a_normal;" +
      "v_brightness = (dot(normal, u_lightVec) + 1.0) / 2.0;";
  
  private static final String VARYINGS =
      "varying vec2 v_tc;" +
      "varying float v_brightness;";
  
  private static final String FRAG_VARS =
      "uniform sampler2D s_baseMap;" +
      "uniform vec3 u_lightColor;";
  
  private static final String FRAG_MAIN =
      "vec3 texColor = texture2D(s_baseMap, v_tc).rgb;" +
      "float brightness = v_brightness;" + 
      "if (brightness > .6) {" +
      "  brightness = 1.0;" +
      "} else if (brightness > .4) {" +
      "  brightness = .6;" +
      "} else {" +
      "  brightness = .4;" +
      "}" +
      "gl_FragColor = vec4(texColor * brightness, 1.0);";
  
  private Texture texture;
  
  public CelShadedMaterial(Texture texture) {
    this.texture = texture;
  }
  
  @Override
  public void onAttachAttribs() {
    attachAttrib(a_pos, 3);
    attachAttrib(a_normal, 3);
    attachAttrib(a_mtl, 2);
    
    texture.use(0, ShaderLib.S_BASEMAP,
        this.program.getHandle());
  }
  
  @Override
  public void onLoadObject(GameObject obj, float[] vbo, int vertCount) {
    loadArrayToVbo(obj.verts, vbo, 3, vertCount);
    loadArrayToVbo(obj.normals, vbo, 3, vertCount);
    loadArrayToVbo(obj.mtl, vbo, 2, vertCount);
  }
  
  @Override
  public void makeProgram() {
    final ProgramSource prog = new ProgramSource(VARYINGS, null, VERT_VARS,
        VERT_MAIN, null, FRAG_VARS, FRAG_MAIN);
    setProgram(prog, STRIDE);
  }
}

Java Source Code List

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