Android Open Source - spaceShell Mesh Creator

From Project

Back to project page spaceShell.

License

The source code is released under:

MIT License

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Java Source Code

package fr.creationjeuxjava.spaceshell;
/*from ww w  . ja va  2 s.c  om*/
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Mesh;
import com.badlogic.gdx.graphics.VertexAttribute;
import com.badlogic.gdx.graphics.VertexAttributes.Usage;
import com.badlogic.gdx.graphics.glutils.ShaderProgram;

//============================================================================
// Name        : MeshCreator.java from SpaceShell
// Author      : JohnCarmack
// Version     : 
// Copyright   : www.creationjeuxjava.fr !
// Description : 
// Date       : 27 fvr. 2014 at 21:40:33  
//============================================================================
public class MeshCreator {

  private Mesh mesh;
  private ShaderProgram meshShader;

  public MeshCreator() {
    createShader();
  }

  public void createMesh(float[] vertices) {
    mesh = new Mesh(true, vertices.length, 0, new VertexAttribute(
        Usage.Position, 2, "a_position"));
    mesh.setVertices(vertices);
  }

  public void drawMesh() {
    if (mesh == null)
      throw new IllegalStateException(
          "drawMesh called before a mesh has been created.");

    meshShader.begin();
    mesh.render(meshShader, GL20.GL_TRIANGLES);
    meshShader.end();
  }

  private void createShader() {
    // Vertex shader
    String vertexShader = "attribute vec4 a_position;    \n"
        + "void main()                   \n"
        + "{                             \n"
        + "   gl_Position = a_position;  \n"
        + "}                             \n";

    // this one tells it what goes in between the points (i.e
    // colour/texture)
    String fragmentShader = "#ifdef GL_ES                \n"
        + "precision mediump float;    \n"
        + "#endif                      \n"
        + "void main()                 \n"
        + "{                           \n"
        + "  gl_FragColor = vec4(1.0,0.2,0.0,1.0);    \n" + "}";

    // make an actual shader from our strings
    meshShader = new ShaderProgram(vertexShader, fragmentShader);

    // check there's no shader compile errors
    if (meshShader.isCompiled() == false)
      throw new IllegalStateException(meshShader.getLog());
  }

  public void dispose() {
    mesh.dispose();
    meshShader.dispose();
  }

}

Java Source Code List