Examples with VertexBufferObjectWithVAO com.badlogic.gdx.graphics.glutils.VertexBufferObjectWithVAO used on opensource projects

Example 1 with VertexBufferObjectWithVAO

use of com.badlogic.gdx.graphics.glutils.VertexBufferObjectWithVAO in project libgdx by libgdx.

the class VBOWithVAOPerformanceTest method create.

@Override
public void create() {
    if (Gdx.gl30 == null) {
        throw new GdxRuntimeException("GLES 3.0 profile required for this test");
    }
    String vertexShader = "attribute vec4 a_position;    \n" + "attribute vec4 a_color;\n" + "attribute vec2 a_texCoord0;\n" + "uniform mat4 u_worldView;\n" + "varying vec4 v_color;" + "varying vec2 v_texCoords;" + "void main()                  \n" + "{                            \n" + "   v_color = a_color; \n" + "   v_texCoords = a_texCoord0; \n" + "   gl_Position =  u_worldView * a_position;  \n" + "}                            \n";
    String fragmentShader = "#ifdef GL_ES\n" + "precision mediump float;\n" + "#endif\n" + "varying vec4 v_color;\n" + "varying vec2 v_texCoords;\n" + "uniform sampler2D u_texture;\n" + "void main()                                  \n" + "{                                            \n" + "  gl_FragColor = v_color * texture2D(u_texture, v_texCoords);\n" + "}";
    shader = new ShaderProgram(vertexShader, fragmentShader);
    if (shader.isCompiled() == false) {
        Gdx.app.log("ShaderTest", shader.getLog());
        Gdx.app.exit();
    }
    int numSprites = 1000;
    int maxIndices = numSprites * 6;
    int maxVertices = numSprites * 6;
    VertexAttribute[] vertexAttributes = new VertexAttribute[] { VertexAttribute.Position(), VertexAttribute.ColorUnpacked(), VertexAttribute.TexCoords(0) };
    VertexBufferObjectWithVAO newVBOWithVAO = new VertexBufferObjectWithVAO(false, maxVertices, vertexAttributes);
    OldVertexBufferObjectWithVAO oldVBOWithVAO = new OldVertexBufferObjectWithVAO(false, maxVertices, vertexAttributes);
    IndexBufferObjectSubData newIndices = new IndexBufferObjectSubData(false, maxIndices);
    IndexBufferObjectSubData oldIndices = new IndexBufferObjectSubData(false, maxIndices);
    newVBOWithVAOMesh = new Mesh(newVBOWithVAO, newIndices, false) {
    };
    oldVBOWithVAOMesh = new Mesh(oldVBOWithVAO, oldIndices, false) {
    };
    float[] vertexArray = new float[maxVertices * 9];
    int index = 0;
    int stride = 9 * 6;
    for (int i = 0; i < numSprites; i++) {
        addRandomSprite(vertexArray, index);
        index += stride;
    }
    short[] indexArray = new short[maxIndices];
    for (short i = 0; i < maxIndices; i++) {
        indexArray[i] = i;
    }
    newVBOWithVAOMesh.setVertices(vertexArray);
    newVBOWithVAOMesh.setIndices(indexArray);
    oldVBOWithVAOMesh.setVertices(vertexArray);
    oldVBOWithVAOMesh.setIndices(indexArray);
    texture = new Texture(Gdx.files.internal("data/badlogic.jpg"));
    batch = new SpriteBatch();
    bitmapFont = new BitmapFont();
    stringBuilder = new StringBuilder();
}