CoordinateSystemRenderer 的实现是什么？
我今天遇到了同样的要求并尝试了，它确实有效，这意味着你可以将 2 个GLSurfaceView 放入同一个活动中。
有一点需要注意，
- 在
GLRender 中，当onSurfaceChanged 被调用时，您必须调整视口的大小
- 使用 2
GLSurfaceView，渲染线程将为 2，因此会出现同步问题。这取决于您对onDrawFrame 的实现。
SDKGLSurfaceViewActivity中有一个使用Android API demo的快速测试
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.apis.graphics;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.opengl.GLSurfaceView;
/**
* Render a pair of tumbling cubes.
*/
public class CubeRenderer implements GLSurfaceView.Renderer
{
boolean isReverse = false;
public CubeRenderer(boolean useTranslucentBackground, boolean isReverse)
{
mTranslucentBackground = useTranslucentBackground;
mCube = new Cube();
this.isReverse = isReverse;
}
public CubeRenderer(boolean useTranslucentBackground)
{
this(useTranslucentBackground, false);
}
public void onDrawFrame(GL10 gl)
{
/*
* Usually, the first thing one might want to do is to clear the screen. The most efficient way of doing this is
* to use glClear().
*/
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
/*
* Now we're ready to draw some 3D objects
*/
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0, 0, -3.0f);
gl.glRotatef(mAngle, 0, 1, 0);
gl.glRotatef(mAngle * 0.25f, 1, 0, 0);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
mCube.draw(gl);
gl.glRotatef(mAngle * 2.0f, 0, 1, 1);
gl.glTranslatef(0.5f, 0.5f, 0.5f);
mCube.draw(gl);
if (isReverse)
{
mAngle -= 1.2f;
}
else
{
mAngle += 1.2f;
}
}
public void onSurfaceChanged(GL10 gl, int width, int height)
{
System.out.println("Joey's Log width : " + width + " height : " + height);
gl.glViewport(0, 0, width, height);
/*
* Set our projection matrix. This doesn't have to be done each time we draw, but usually a new projection needs
* to be set when the viewport is resized.
*/
float ratio = (float) width / height;
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
}
public void onSurfaceCreated(GL10 gl, EGLConfig config)
{
/*
* By default, OpenGL enables features that improve quality but reduce performance. One might want to tweak that
* especially on software renderer.
*/
gl.glDisable(GL10.GL_DITHER);
/*
* Some one-time OpenGL initialization can be made here probably based on features of this particular context
*/
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);
if (mTranslucentBackground)
{
gl.glClearColor(0, 0, 0, 0);
}
else
{
gl.glClearColor(1, 1, 1, 1);
}
gl.glEnable(GL10.GL_CULL_FACE);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glEnable(GL10.GL_DEPTH_TEST);
}
private boolean mTranslucentBackground;
private Cube mCube;
private float mAngle;
}
------------------------------------------------------------------------------------------
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.apis.graphics;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.opengl.GLSurfaceView;
/**
* Render a pair of tumbling cubes.
*/
public class CubeRenderer implements GLSurfaceView.Renderer {
boolean isReverse = false;
public CubeRenderer(boolean useTranslucentBackground,boolean isReverse) {
mTranslucentBackground = useTranslucentBackground;
mCube = new Cube();
this.isReverse = isReverse;
}
public CubeRenderer(boolean useTranslucentBackground)
{
this(useTranslucentBackground, false);
}
public void onDrawFrame(GL10 gl) {
/*
* Usually, the first thing one might want to do is to clear
* the screen. The most efficient way of doing this is to use
* glClear().
*/
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
/*
* Now we're ready to draw some 3D objects
*/
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0, 0, -3.0f);
gl.glRotatef(mAngle, 0, 1, 0);
gl.glRotatef(mAngle*0.25f, 1, 0, 0);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
mCube.draw(gl);
gl.glRotatef(mAngle*2.0f, 0, 1, 1);
gl.glTranslatef(0.5f, 0.5f, 0.5f);
mCube.draw(gl);
if (isReverse)
{
mAngle -= 1.2f;
}
else
{
mAngle += 1.2f;
}
}
public void onSurfaceChanged(GL10 gl, int width, int height) {
System.out.println("Joey's Log width : " + width + " height : " + height);
gl.glViewport(0, 0, width, height);
/*
* Set our projection matrix. This doesn't have to be done
* each time we draw, but usually a new projection needs to
* be set when the viewport is resized.
*/
float ratio = (float) width / height;
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
/*
* By default, OpenGL enables features that improve quality
* but reduce performance. One might want to tweak that
* especially on software renderer.
*/
gl.glDisable(GL10.GL_DITHER);
/*
* Some one-time OpenGL initialization can be made here
* probably based on features of this particular context
*/
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT,
GL10.GL_FASTEST);
if (mTranslucentBackground) {
gl.glClearColor(0,0,0,0);
} else {
gl.glClearColor(1,1,1,1);
}
gl.glEnable(GL10.GL_CULL_FACE);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glEnable(GL10.GL_DEPTH_TEST);
}
private boolean mTranslucentBackground;
private Cube mCube;
private float mAngle;
}