Android Open Source - Tanks Model3 D

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License

The source code is released under:
MIT License
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Java Source Code

package com.ThirtyNineEighty.Renderable.Renderable3D;
/*from  w  ww  . jav  a2 s.  c o  m*/
import android.opengl.GLES20;
import android.opengl.Matrix;
import android.util.Log;

import com.ThirtyNineEighty.Helpers.Vector3;
import com.ThirtyNineEighty.Renderable.Renderable;
import com.ThirtyNineEighty.Renderable.Shader;
import com.ThirtyNineEighty.Renderable.Shader3D;
import com.ThirtyNineEighty.System.GameContext;

import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class Model3D implements I3DRenderable
{
  private float[] modelProjectionViewMatrix;
  private float[] modelMatrix;

  private int textureHandle;
  private int bufferHandle;
  private int numOfTriangles;

  private boolean closed;

  public Model3D(String geometryName, String textureName)
  {
    modelMatrix = new float[16];
    modelProjectionViewMatrix = new float[16];

    loadGeometry(String.format("Models/%s.raw", geometryName));
    textureHandle = Renderable.loadTexture(String.format("Textures/%s.png", textureName), true);
  }

  public void close()
  {
    if (closed)
      return;

    closed = true;

    GLES20.glDeleteTextures(1, new int[] { textureHandle }, 0);
    GLES20.glDeleteBuffers(1, new int[] { bufferHandle }, 0);
  }

  @Override
  public void finalize() throws Throwable
  {
    super.finalize();

    close();
  }

  @Override
  public void draw(float[] projectionViewMatrix, float[] lightPosition)
  {
    // build result matrix
    Matrix.multiplyMM(modelProjectionViewMatrix, 0, projectionViewMatrix, 0, modelMatrix, 0);

    // bind texture to 0 slot
    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);

    // bind data buffer
    GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, bufferHandle);

    Shader3D shader = (Shader3D) Shader.getCurrent();

    // send uniform data to shader
    GLES20.glUniform1i(shader.uniformTextureHandle, 0);
    GLES20.glUniformMatrix4fv(shader.uniformMatrixProjectionHandle, 1, false, modelProjectionViewMatrix, 0);
    GLES20.glUniformMatrix4fv(shader.uniformMatrixHandle, 1, false, modelMatrix, 0);
    GLES20.glUniform3fv(shader.uniformLightVectorHandle, 1, lightPosition, 0);

    // set offsets to arrays for buffer
    GLES20.glVertexAttribPointer(shader.attributePositionHandle, 3, GLES20.GL_FLOAT, false, 32, 0);
    GLES20.glVertexAttribPointer(shader.attributeNormalHandle, 3, GLES20.GL_FLOAT, false, 32, 12);
    GLES20.glVertexAttribPointer(shader.attributeTexCoordHandle, 2, GLES20.GL_FLOAT, false, 32, 24);

    // enable attribute arrays
    GLES20.glEnableVertexAttribArray(shader.attributePositionHandle);
    GLES20.glEnableVertexAttribArray(shader.attributeNormalHandle);
    GLES20.glEnableVertexAttribArray(shader.attributeTexCoordHandle);

    // validating if debug
    shader.validateProgram();

    // draw
    GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, numOfTriangles * 3);

    // disable attribute arrays
    GLES20.glDisableVertexAttribArray(shader.attributePositionHandle);
    GLES20.glDisableVertexAttribArray(shader.attributeNormalHandle);
    GLES20.glDisableVertexAttribArray(shader.attributeTexCoordHandle);
  }

  public void setGlobal(Vector3 position, Vector3 angles)
  {
    Matrix.setIdentityM(modelMatrix, 0);
    Matrix.translateM(modelMatrix, 0, position.getX(), position.getY(), position.getZ());

    Matrix.rotateM(modelMatrix, 0, angles.getX(), 1.0f, 0.0f, 0.0f);
    Matrix.rotateM(modelMatrix, 0, angles.getY(), 0.0f, 1.0f, 0.0f);
    Matrix.rotateM(modelMatrix, 0, angles.getZ(), 0.0f, 0.0f, 1.0f);
  }

  private void loadGeometry(String fileName)
  {
    try
    {
      InputStream stream = GameContext.getAppContext().getAssets().open(fileName);

      int size = stream.available();
      byte[] data = new byte[size];
      stream.read(data);
      stream.close();

      ByteBuffer dataBuffer = ByteBuffer.allocateDirect(size - 4);
      dataBuffer.order(ByteOrder.nativeOrder());
      dataBuffer.put(data, 4, size - 4);
      dataBuffer.position(0);

      ByteBuffer numBuffer = ByteBuffer.allocateDirect(4);
      numBuffer.order(ByteOrder.nativeOrder());
      numBuffer.put(data, 0, 4);

      numOfTriangles = numBuffer.getInt(0);

      int[] buffers = new int[1];
      GLES20.glGenBuffers(1, buffers, 0);
      GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, buffers[0]);
      GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, dataBuffer.capacity(), dataBuffer, GLES20.GL_STATIC_DRAW);

      int error;
      if ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR)
        Log.e("Error", Integer.toString(error));

      bufferHandle = buffers[0];
    }
    catch(IOException e)
    {
      Log.e("Error", e.getMessage());
    }
  }
}
Java Source Code List
