Example usage for android.opengl Matrix setRotateM

Introduction

In this page you can find the example usage for android.opengl Matrix setRotateM.

Prototype

public static void setRotateM(float[] rm, int rmOffset, float a, float x, float y, float z) 

Source Link

Document

Creates a matrix for rotation by angle a (in degrees) around the axis (x, y, z).

Usage

From source file:Main.java

/**
 * Returns texture matrix that will have the effect of rotating the frame |rotationDegree|
 * clockwise when rendered.//from w  w  w  .ja va  2  s .  com
 */
public static float[] rotateTextureMatrix(float[] textureMatrix, float rotationDegree) {
    final float[] rotationMatrix = new float[16];
    Matrix.setRotateM(rotationMatrix, 0, rotationDegree, 0, 0, 1);
    adjustOrigin(rotationMatrix);
    return multiplyMatrices(textureMatrix, rotationMatrix);
}

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From source file:com.google.vrtoolkit.cardboard.samples.treasurehunt.MainActivity.java

/**
 * Find a new random position for the object.
 *
 * <p>We'll rotate it around the Y-axis so it's out of sight, and then up or down by a little bit.
 *///  w  w  w. ja  v  a  2  s .  com
private void hideObject() {
    float[] rotationMatrix = new float[16];
    float[] posVec = new float[4];

    // First rotate in XZ plane, between 90 and 270 deg away, and scale so that we vary
    // the object's distance from the user.
    float angleXZ = (float) Math.random() * 180 + 90;
    Matrix.setRotateM(rotationMatrix, 0, angleXZ, 0f, 1f, 0f);
    float oldObjectDistance = objectDistance;
    objectDistance = (float) Math.random() * (MAX_MODEL_DISTANCE - MIN_MODEL_DISTANCE) + MIN_MODEL_DISTANCE;
    float objectScalingFactor = objectDistance / oldObjectDistance;
    Matrix.scaleM(rotationMatrix, 0, objectScalingFactor, objectScalingFactor, objectScalingFactor);
    Matrix.multiplyMV(posVec, 0, rotationMatrix, 0, modelCube, 12);

    float angleY = (float) Math.random() * 80 - 40; // Angle in Y plane, between -40 and 40.
    angleY = (float) Math.toRadians(angleY);
    float newY = (float) Math.tan(angleY) * objectDistance;

    modelPosition[0] = posVec[0];
    modelPosition[1] = newY;
    modelPosition[2] = posVec[2];

    updateModelPosition();
}

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From source file:com.tumblr.cardboard.Tumblr3DActivity.java

private static void placePhoto(float[][] modelRects, float[][] imageRects, int texIndex, float scale,
        float azimuth, float inclination, float yTranslate) {
    float[] azimuthMatrix = new float[16];
    Matrix.setRotateM(azimuthMatrix, 0, azimuth, 0, 1, 0);

    float[] inclinationMatrix = new float[16];
    Matrix.setRotateM(inclinationMatrix, 0, inclination, 1, 0, 0);

    float[] rotationMatrix = new float[16];
    Matrix.multiplyMM(rotationMatrix, 0, azimuthMatrix, 0, inclinationMatrix, 0);

    Matrix.multiplyMM(modelRects[texIndex], 0, imageRects[texIndex], 0, rotationMatrix, 0);
    Matrix.translateM(modelRects[texIndex], 0, 0f, 0f, yTranslate);
    Matrix.scaleM(modelRects[texIndex], 0, scale, scale, 1f);
}

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