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Merge "docs: OpenGL Training sample code fixes" into jb-mr2-docs

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Scott Main
2013-08-02 22:27:13 +00:00
committed by Android (Google) Code Review
parent 1f19690322 ab1f29d935
commit 9a0087f227
1 changed files with 3 additions and 3 deletions
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6
docs/html/training/graphics/opengl/motion.jd
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@@ -47,7 +47,7 @@ to a shape with rotation.</p>
<p>Rotating a drawing object with OpenGL ES 2.0 is relatively simple. You create another
transformation matrix (a rotation matrix) and then combine it with your projection and
camera view tranformation matrices:</p>
camera view transformation matrices:</p>
<pre>
private float[] mRotationMatrix = new float[16];
@@ -56,7 +56,7 @@ public void onDrawFrame(GL10 gl) {
// Create a rotation transformation for the triangle
long time = SystemClock.uptimeMillis() % 4000L;
float angle = 0.090f * ((int) time);
Matrix.setRotateM(mRotationMatrix, 0, mAngle, 0, 0, -1.0f);
Matrix.setRotateM(mRotationMatrix, 0, angle, 0, 0, -1.0f);
// Combine the rotation matrix with the projection and camera view
Matrix.multiplyMM(mMVPMatrix, 0, mRotationMatrix, 0, mMVPMatrix, 0);
@@ -67,7 +67,7 @@ public void onDrawFrame(GL10 gl) {
</pre>
<p>If your triangle does not rotate after making these changes, make sure you have commented out the
{@link android.opengl.GLSurfaceView#RENDERMODE_WHEN_DIRTY GLSurfaceView.RENDERMODE_WHEN_DIRTY}
{@link android.opengl.GLSurfaceView#RENDERMODE_WHEN_DIRTY GLSurfaceView.RENDERMODE_WHEN_DIRTY}
setting, as described in the next section.</p>