FileDocCategorySizeDatePackage
Projector.javaAPI DocAndroid 1.5 API2430Wed May 06 22:41:08 BST 2009com.example.android.apis.graphics.spritetext

Projector

public class Projector extends Object
A utility that projects

Fields Summary
private MatrixGrabber
mGrabber
private boolean
mMVPComputed
private float[]
mMVP
private float[]
mV
private int
mX
private int
mY
private int
mViewWidth
private int
mViewHeight
Constructors Summary
public Projector()

        mMVP = new float[16];
        mV = new float[4];
        mGrabber = new MatrixGrabber();
Methods Summary
public voidgetCurrentModelView(javax.microedition.khronos.opengles.GL10 gl)
Get the current model view matrix. Has the side-effect of setting current matrix mode to GL_MODELVIEW

param
gl

        mGrabber.getCurrentModelView(gl);
        mMVPComputed = false;
public voidgetCurrentProjection(javax.microedition.khronos.opengles.GL10 gl)
Get the current projection matrix. Has the side-effect of setting current matrix mode to GL_PROJECTION

param
gl

        mGrabber.getCurrentProjection(gl);
        mMVPComputed = false;
public voidproject(float[] obj, int objOffset, float[] win, int winOffset)

        if (!mMVPComputed) {
            Matrix.multiplyMM(mMVP, 0, mGrabber.mProjection, 0, mGrabber.mModelView, 0);
            mMVPComputed = true;
        }

        Matrix.multiplyMV(mV, 0, mMVP, 0, obj, objOffset);

        float rw = 1.0f / mV[3];

        win[winOffset] = mX + mViewWidth * (mV[0] * rw + 1.0f) * 0.5f;
        win[winOffset + 1] = mY + mViewHeight * (mV[1] * rw + 1.0f) * 0.5f;
        win[winOffset + 2] = (mV[2] * rw + 1.0f) * 0.5f;
public voidsetCurrentView(int x, int y, int width, int height)

        mX = x;
        mY = y;
        mViewWidth = width;
        mViewHeight = height;