Mesh

MeshTest.java

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Mesh;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.VertexAttribute;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.glutils.ShaderProgram;
import com.badlogic.gdx.math.Matrix4;

public class MeshTest extends ApplicationAdapter {

	private Mesh mesh;
	private Texture texture;
	private ShaderProgram shader;

	Matrix4 projectionMatrix;

	@Override
	public void create() {
		mesh = new Mesh(true, 3, 3,
				VertexAttribute.Position(),
				VertexAttribute.ColorPacked(),
				VertexAttribute.TexCoords(0));               									// Create the mesh with position, colour and tex coord vertex attributes

		mesh.setVertices(new float[]{-0.5f, -0.5f, 0, Color.toFloatBits(255, 0, 0, 255), 0, 1,
				0.5f, -0.5f, 0, Color.toFloatBits(0, 255, 0, 255), 1, 1,
				0, 0.5f, 0, Color.toFloatBits(0, 0, 255, 255), 0.5f, 0});                       // Setup our mesh with 3 vertices

		mesh.setIndices(new short[]{0, 1, 2});                                                  // Define the indices of our mesh, triangle with the first 3 vertices

		texture = new Texture(Gdx.files.internal("Space.png"));                                 // Load a texture
		shader = SpriteBatch.createDefaultShader();                                             // Create SpriteBatch's default shader.

		projectionMatrix = new Matrix4();                                                       // Create a Matrix4 that we will use for our projection matrix
		projectionMatrix.setToOrtho(-1, 1, -1, 1, 0, 1);                                        // Set up our matrix as an orthographic projection, see http://www.opengl.org/sdk/docs/man/xhtml/glOrtho.xml
	}


	@Override
	public void render() {
		Gdx.gl.glClearColor(0.2f, 0.2f, 0.2f, 1f);                                              // Clear to colour
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);                                               // Clear colour buffer

		shader.begin();                                                                         // Begin our shader
		shader.setUniformMatrix("u_projTrans", projectionMatrix);                               // Pass in our projection uniform to our shader. Uniform name "u_projTrans"
		shader.setUniformi("u_texture", 0);                                                     // Pass in our texture uniform to our shader. Uniform name "u_texture".

		texture.bind();                                                                         // Bind the texture
		mesh.render(shader, GL20.GL_TRIANGLES);                                                 // Render our mesh with the shader, and primitive type GL_TRIANGLES
		shader.end();                                                                           // End our shader

	}

	public static void main(String[] args) {
		new LwjglApplication(new MeshTest());
	}
}