add Rotation To Matrix - Android java.lang

Android examples for java.lang:Math Matrix

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Description

add Rotation To Matrix

Demo Code


//package com.java2s;
import android.opengl.Matrix;

public class Main {
    public static float[] addRotationToMatrix(float rotX, float rotY,
            float rotZ) {
        float[] mRotMatrixX = new float[16];
        float[] mRotMatrixY = new float[16];
        float[] mRotMatrix = new float[16];

        Matrix.setRotateM(mRotMatrixX, 0, rotY, 1.0f, 0.0f, 0.0f);
        Matrix.setRotateM(mRotMatrixY, 0, rotZ, 0.0f, 0.0f, 1.0f);
        Matrix.multiplyMM(mRotMatrix, 0, mRotMatrixX, 0, mRotMatrixY, 0);
        return mRotMatrix;
    }//w  ww  . j  av  a 2 s .  com

    public static void addRotationToMatrix(float[] rotMat, float[] rotation) {
        float[] mRotMatrixX = new float[16];
        float[] mRotMatrixY = new float[16];
        float[] mRotMatrixZ = new float[16];

        Matrix.setRotateM(mRotMatrixX, 0, rotation[0], 1.0f, 0.0f, 0.0f);
        Matrix.setRotateM(mRotMatrixY, 0, rotation[1], 0.0f, 1.0f, 0.0f);
        Matrix.setRotateM(mRotMatrixZ, 0, rotation[2], 0.0f, 0.0f, 1.0f);
        multMatrices(rotMat, mRotMatrixX, mRotMatrixY, mRotMatrixZ, rotMat);
    }

    public static void multMatrices(float[] produktMatrix,
            float[]... matrices) {
        float[] tmp = new float[16];
        Matrix.setIdentityM(tmp, 0);
        for (int i = matrices.length - 1; i >= 0; i--) {
            Matrix.multiplyMM(tmp, 0, matrices[i], 0, tmp, 0);
        }
        for (int i = 0; i < 16; i++) {
            produktMatrix[i] = tmp[i];
        }
    }
}

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