Android Open Source - touchgloid Transform

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From Project

Back to project page touchgloid.

License

The source code is released under:

MIT License

Java Source Code

package rucamzu.opengl;
//  w ww  .  ja  v a2s  .  c om
import static android.opengl.Matrix.multiplyMM;
import static android.opengl.Matrix.multiplyMV;
import static android.opengl.Matrix.orthoM;
import static android.opengl.Matrix.rotateM;
import static android.opengl.Matrix.scaleM;
import static android.opengl.Matrix.setIdentityM;
import static android.opengl.Matrix.translateM;

public class Transform {

  private final float[] elements;

  private Transform() {
    elements = new float[16];
  }

  private Transform(float[] elements) {
    this.elements = elements;
  }

  public static Transform createIdentity() {
    Transform identity = new Transform();

    setIdentityM(identity.getElements(), 0);

    return identity;
  }

  public static Transform createRotation(float degrees, float axisX, float axisY, float axisZ) {
    Transform rotation = createIdentity();

    rotateM(rotation.getElements(), 0, degrees, axisX, axisY, axisZ);

    return rotation;
  }

  public static Transform createRotation(float degrees, Vector axis) {
    Transform rotation = createIdentity();

    rotateM(rotation.getElements(), 0, degrees, axis.x(), axis.y(), axis.z());

    return rotation;
  }
  
  public static Transform createScale(float x, float y, float z) {
    Transform scale = createIdentity();

    scaleM(scale.getElements(), 0, x, y, z);

    return scale;
  }

  public static Transform createTranslation(float x, float y, float z) {
    Transform translation = createIdentity();

    translateM(translation.getElements(), 0, x, y, z);

    return translation;
  }

  public static Transform createTranslation(Vector vector) {
    Transform translation = createIdentity();

    translateM(translation.getElements(), 0, vector.x(), vector.y(), vector.z());

    return translation;
  }

  public static Transform createProjectionOrtho(float width, float height) {
    Transform ortho = createIdentity();

    final float aspect = width > height ? width / height : height / width;
    
    if (width > height) {  // Landscape
      orthoM(ortho.getElements(), 0, -aspect, aspect, -1f, 1f, -1f, 1f);
    } else {        // Portrait or square
      orthoM(ortho.getElements(), 0, -1f, 1f, -aspect, aspect, -1f, 1f);
    }
    
    return ortho;
  }
  
  public static Transform compose(Transform transform1, Transform transform2) {
    Transform result = new Transform();
    
    multiplyMM(result.getElements(), 0, transform1.getElements(), 0, transform2.getElements(), 0);
    
    return result;
  }
  
  public static Vector apply(Transform transform, Vector vector) {
    Vector result = Vector.create();
    
    multiplyMV(result.getElements(), 0, transform.getElements(), 0, vector.getElements(), 0);
    
    return result;
  }

  public float[] getElements() {
    return elements;
  }

}

Java Source Code List

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