1 /******************************************************************************* 2 * Copyright 2011 See AUTHORS file. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 ******************************************************************************/ 16 17 package com.badlogic.gdx.tests; 18 19 import com.badlogic.gdx.Gdx; 20 import com.badlogic.gdx.graphics.GL20; 21 import com.badlogic.gdx.graphics.Mesh; 22 import com.badlogic.gdx.graphics.Texture; 23 import com.badlogic.gdx.graphics.VertexAttribute; 24 import com.badlogic.gdx.graphics.glutils.ShaderProgram; 25 import com.badlogic.gdx.math.Matrix4; 26 import com.badlogic.gdx.math.Vector3; 27 import com.badlogic.gdx.tests.utils.GdxTest; 28 29 public class MeshShaderTest extends GdxTest { 30 ShaderProgram shader; 31 Mesh mesh; 32 Texture texture; 33 Matrix4 matrix = new Matrix4(); 34 35 @Override create()36 public void create () { 37 String vertexShader = "attribute vec4 a_position; \n" + "attribute vec4 a_color;\n" + "attribute vec2 a_texCoord0;\n" 38 + "uniform mat4 u_worldView;\n" + "varying vec4 v_color;" + "varying vec2 v_texCoords;" 39 + "void main() \n" + "{ \n" + " v_color = vec4(1, 1, 1, 1); \n" 40 + " v_texCoords = a_texCoord0; \n" + " gl_Position = u_worldView * a_position; \n" 41 + "} \n"; 42 String fragmentShader = "#ifdef GL_ES\n" + "precision mediump float;\n" + "#endif\n" + "varying vec4 v_color;\n" 43 + "varying vec2 v_texCoords;\n" + "uniform sampler2D u_texture;\n" + "void main() \n" 44 + "{ \n" + " gl_FragColor = v_color * texture2D(u_texture, v_texCoords);\n" 45 + "}"; 46 47 shader = new ShaderProgram(vertexShader, fragmentShader); 48 if (shader.isCompiled() == false) { 49 Gdx.app.log("ShaderTest", shader.getLog()); 50 Gdx.app.exit(); 51 } 52 53 mesh = new Mesh(true, 4, 6, VertexAttribute.Position(), VertexAttribute.ColorUnpacked(), VertexAttribute.TexCoords(0)); 54 mesh.setVertices(new float[] {-0.5f, -0.5f, 0, 1, 1, 1, 1, 0, 1, 0.5f, -0.5f, 0, 1, 1, 1, 1, 1, 1, 0.5f, 0.5f, 0, 1, 1, 1, 55 1, 1, 0, -0.5f, 0.5f, 0, 1, 1, 1, 1, 0, 0}); 56 mesh.setIndices(new short[] {0, 1, 2, 2, 3, 0}); 57 texture = new Texture(Gdx.files.internal("data/bobrgb888-32x32.png")); 58 } 59 60 Vector3 axis = new Vector3(0, 0, 1); 61 float angle = 0; 62 63 @Override render()64 public void render () { 65 angle += Gdx.graphics.getDeltaTime() * 45; 66 matrix.setToRotation(axis, angle); 67 68 Gdx.gl20.glViewport(0, 0, Gdx.graphics.getBackBufferWidth(), Gdx.graphics.getBackBufferHeight()); 69 Gdx.gl20.glClearColor(0.2f, 0.2f, 0.2f, 1); 70 Gdx.gl20.glClear(GL20.GL_COLOR_BUFFER_BIT); 71 Gdx.gl20.glEnable(GL20.GL_TEXTURE_2D); 72 Gdx.gl20.glEnable(GL20.GL_BLEND); 73 Gdx.gl20.glBlendFunc(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA); 74 texture.bind(); 75 shader.begin(); 76 shader.setUniformMatrix("u_worldView", matrix); 77 shader.setUniformi("u_texture", 0); 78 mesh.render(shader, GL20.GL_TRIANGLES); 79 shader.end(); 80 } 81 82 @Override dispose()83 public void dispose () { 84 mesh.dispose(); 85 texture.dispose(); 86 shader.dispose(); 87 } 88 } 89
