Example usage for android.opengl GLES20 glVertexAttribPointer

Introduction

In this page you can find the example usage for android.opengl GLES20 glVertexAttribPointer.

Prototype

public static void glVertexAttribPointer(int indx, int size, int type, boolean normalized, int stride,
            java.nio.Buffer ptr) 

Source Link

Usage

From source file:com.aimfire.gallery.cardboard.PhotoActivity.java

/**
 * Draws a frame for an eye./*from   w w  w .jav a 2s .c o  m*/
 *
 * @param eye The eye to render. Includes all required transformations.
 */
@Override
public void onDrawEye(Eye eye) {
    if (mAssetInd == -1) {
        // we are still showing instruction, return without doing anything
        return;
    }

    if (!mAssetChangedLeft && !mAssetChangedRight) {
        // nothing changed, do nothing and return
        return;
    }

    if (eye.getType() == Eye.Type.LEFT)
        mAssetChangedLeft = false;
    else if (eye.getType() == Eye.Type.RIGHT)
        mAssetChangedRight = false;

    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
    checkGLError("mColorParam");

    GLES20.glUseProgram(mPicProgram);

    GLES20.glUniform1f(mDimRatioParam, mDimRatio);

    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
    if (eye.getType() == Eye.Type.LEFT) {
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureCurr[0]);
    } else {
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureCurr[1]);
    }

    // set the zoom level
    GLES20.glUniform1f(mZoomParam, sZoom[mImgZoomInd]);

    /*
     * if user prefers negative parallax, shift window on left frame leftward and right frame
     * rightward. if user prefers positive parallax, do the opposite
     */
    if (eye.getType() == Eye.Type.LEFT) {
        GLES20.glUniform1f(mParallaxParam, mImgParallaxAdj / 2.0f);
    } else {
        GLES20.glUniform1f(mParallaxParam, -mImgParallaxAdj / 2.0f);
    }

    // Set the position of the picture
    //float zoomCoords[] = new float[picCoords.length];
    //for(int i=0; i<picCoords.length; i++)
    //zoomCoords[i] = picCoords[i] * zoom[zoomInd];

    //ByteBuffer bblVertices = ByteBuffer.allocateDirect(zoomCoords.length * 4);
    ByteBuffer bblVertices = ByteBuffer.allocateDirect(picCoords.length * 4);
    bblVertices.order(ByteOrder.nativeOrder());
    mPicVertices = bblVertices.asFloatBuffer();
    //mPicVertices.put(zoomCoords);
    mPicVertices.put(picCoords);
    mPicVertices.position(0);

    GLES20.glVertexAttribPointer(mPicPositionParam, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, vertexStride,
            mPicVertices);

    GLES20.glDrawElements(GLES20.GL_TRIANGLES, /* mode */
            6, /* count */
            GLES20.GL_UNSIGNED_SHORT, /* type */
            mPicElements /* element array buffer offset */
    );
}

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