Example usage for android.opengl Matrix orthoM

Introduction

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

Prototype

public static void orthoM(float[] m, int mOffset, float left, float right, float bottom, float top, float near,
        float far) 

Source Link

Document

Computes an orthographic projection matrix.

Usage

From source file:com.wlanjie.streaming.camera.CameraView.java

@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    mSurfaceWidth = width;/*w w w. jav  a2 s .  c  o m*/
    mSurfaceHeight = height;
    mFrameBuffer = ByteBuffer.allocate(width * height * 4);
    mCallbacks.onPreview(width, height);

    mEglCore.onInputSizeChanged(width, height);
    GLES20.glViewport(0, 0, width, height);
    mEglCore.onDisplaySizeChange(width, height);

    float outputAspectRatio = width > height ? (float) width / height : (float) height / width;
    float aspectRatio = outputAspectRatio / outputAspectRatio;
    if (width > height) {
        Matrix.orthoM(mProjectionMatrix, 0, -1.0f, 1.0f, -aspectRatio, aspectRatio, -1.0f, 1.0f);
    } else {
        Matrix.orthoM(mProjectionMatrix, 0, -aspectRatio, aspectRatio, -1.0f, 1.0f, -1.0f, 1.0f);
    }
}

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