我正在创建一个小坦克游戏（渲染器是> 1300行代码），目前正在制作游戏中的武器。关于武器的工作变得非常烦人，因为每当我设置(flickering on the screen or complete black screen)时，我都会在屏幕gl_PointSize上注意到意外的东西。
这是如何发生以及如何删除此(OpenGL ES 2.0 vendor: Imagination Technologies, Device: Motorola Milestone, OS: Android 2.3.3)。 z-fighting会成为一个问题吗？
调整setLookAtM不起作用，删除奇怪效果的唯一方法是删除gl_PointSize。
可能gl_PointSize不是问题;游戏中有一个坦克，一个房间和一盏灯，当对武器进行glDrawArrays的调用时，屏幕会闪烁或变成完全黑色一段时间（直到我触摸并旋转坦克）鉴于武器完全在平截头体内。
Matrix.setLookAtM(GLES20Renderer._ViewMatrix, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0);
Matrix.frustumM(GLES20Renderer._ProjectionMatrix, 0, -ratio, ratio, -1, 1, 0.75f, 10);
float[] pointVFA = {
3.0f,3.0f,3.0f,
-3.0f,3.0f,3.0f,
-3.0f,-3.0f,3.0f
};
ByteBuffer pointVBB = ByteBuffer.allocateDirect(pointVFA.length * 4);
pointVBB.order(ByteOrder.nativeOrder());
GLES20Renderer._pointVFBMissile = pointVBB.asFloatBuffer();
GLES20Renderer._pointVFBMissile.put(pointVFA);
GLES20Renderer._pointVFBMissile.position(0);
private static final String _vertexShaderCodeMissiles =
"attribute vec4 aPosition; \n"
+ "void main() { \n"
+ " gl_PointSize = 15.0; \n"
+ " gl_Position = aPosition; \n"
+ "} \n";
private static final String _fragmentShaderCodeMissiles =
"#ifdef GL_FRAGMENT_PRECISION_HIGH \n"
+ "precision highp float; \n"
+ "#else \n"
+ "precision mediump float; \n"
+ "#endif \n"
+ "void main() { \n"
+ " gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); \n"
+ "} \n";
答案 0 :(得分：1)
尝试了所有方法去除黑色空白/闪烁屏幕（经过2周的激动）后，问题终于解决了，对我来说是一个新课程。
似乎在OpenGL ES 2.0中我们不能将缓冲区对象（vbo或ibo）与nio缓冲区混合使用。代码应该主要使用缓冲区对象或仅使用nio。
这是错误的代码：
////////////////////////////////
// program for missiles start //
////////////////////////////////
GLES20.glUseProgram(GLES20Renderer._programMissiles);
GLES20.glVertexAttribPointer(GLES20Renderer._aPositionLocationMissiles, 3, GLES20.GL_FLOAT, false, 12, GLES20Renderer._pointVFBMissile);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aPositionLocationMissiles);
GLES20.glDrawArrays(GLES20.GL_POINTS, 0, 3);
///////////////////////////////
// program for missiles end //
///////////////////////////////
//////////////////////////////
// program for player start //
//////////////////////////////
GLES20.glUseProgram(GLES20Renderer._programBody);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[0]);
GLES20.glVertexAttribPointer(GLES20Renderer._aPositionLocationBody, 3, GLES20.GL_FLOAT, false, 12, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aPositionLocationBody);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[1]);
GLES20.glVertexAttribPointer(GLES20Renderer._aColorLocationBody, 4, GLES20.GL_FLOAT, false, 16, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aColorLocationBody);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[2]);
GLES20.glVertexAttribPointer(GLES20Renderer._aNormalPositionBody, 3, GLES20.GL_FLOAT, false, 0, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aNormalPositionBody);
GLES20.glUniform3f(GLES20Renderer._uLightPositionLocationBody, GLES20Renderer._LightPosInEyeSpace[0], GLES20Renderer._LightPosInEyeSpace[1], GLES20Renderer._LightPosInEyeSpace[2]);
GLES20.glUniformMatrix4fv(GLES20Renderer._uMVPLocationBody, 1, false, GLES20Renderer._MVPMatrixBody, 0);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[3]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, 372, GLES20.GL_UNSIGNED_SHORT, 0);
GLES20.glUseProgram(GLES20Renderer._programNozzle);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[0]);
GLES20.glVertexAttribPointer(GLES20Renderer._aPositionLocationNozzle, 3, GLES20.GL_FLOAT, false, 12, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aPositionLocationNozzle);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[1]);
GLES20.glVertexAttribPointer(GLES20Renderer._aColorLocationNozzle, 4, GLES20.GL_FLOAT, false, 16, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aColorLocationNozzle);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[2]);
GLES20.glVertexAttribPointer(GLES20Renderer._aNormalPositionNozzle, 3, GLES20.GL_FLOAT, false, 0, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aNormalPositionNozzle);
GLES20.glUniform3f(GLES20Renderer._uLightPositionLocationNozzle, GLES20Renderer._LightPosInEyeSpace[0], GLES20Renderer._LightPosInEyeSpace[1], GLES20Renderer._LightPosInEyeSpace[2]);
GLES20.glUniformMatrix4fv(GLES20Renderer._uMVPLocationNozzle, 1, false, GLES20Renderer._MVPMatrixNozzle, 0);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[3]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, 144, GLES20.GL_UNSIGNED_SHORT, 0);
/////////////////////////////
// program for player end //
/////////////////////////////
这是正确的代码：
////////////////////////////////
// program for missiles start //
////////////////////////////////
GLES20.glUseProgram(GLES20Renderer._programMissile);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._missileBuffers[0]);
GLES20.glVertexAttribPointer(GLES20Renderer._aPositionLocationMissile, 3, GLES20.GL_FLOAT, false, 12, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aPositionLocationMissile);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, GLES20Renderer._missileBuffers[1]);
GLES20.glDrawElements(GLES20.GL_POINTS, 3, GLES20.GL_UNSIGNED_SHORT, 0);
///////////////////////////////
// program for missiles end //
///////////////////////////////
//////////////////////////////
// program for player start //
//////////////////////////////
GLES20.glUseProgram(GLES20Renderer._programBody);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[0]);
GLES20.glVertexAttribPointer(GLES20Renderer._aPositionLocationBody, 3, GLES20.GL_FLOAT, false, 12, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aPositionLocationBody);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[1]);
GLES20.glVertexAttribPointer(GLES20Renderer._aColorLocationBody, 4, GLES20.GL_FLOAT, false, 16, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aColorLocationBody);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[2]);
GLES20.glVertexAttribPointer(GLES20Renderer._aNormalPositionBody, 3, GLES20.GL_FLOAT, false, 0, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aNormalPositionBody);
GLES20.glUniform3f(GLES20Renderer._uLightPositionLocationBody, GLES20Renderer._LightPosInEyeSpace[0], GLES20Renderer._LightPosInEyeSpace[1], GLES20Renderer._LightPosInEyeSpace[2]);
GLES20.glUniformMatrix4fv(GLES20Renderer._uMVPLocationBody, 1, false, GLES20Renderer._MVPMatrixBody, 0);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, GLES20Renderer._bodyBuffers[3]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, 372, GLES20.GL_UNSIGNED_SHORT, 0);
GLES20.glUseProgram(GLES20Renderer._programNozzle);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[0]);
GLES20.glVertexAttribPointer(GLES20Renderer._aPositionLocationNozzle, 3, GLES20.GL_FLOAT, false, 12, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aPositionLocationNozzle);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[1]);
GLES20.glVertexAttribPointer(GLES20Renderer._aColorLocationNozzle, 4, GLES20.GL_FLOAT, false, 16, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aColorLocationNozzle);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[2]);
GLES20.glVertexAttribPointer(GLES20Renderer._aNormalPositionNozzle, 3, GLES20.GL_FLOAT, false, 0, 0);
GLES20.glEnableVertexAttribArray(GLES20Renderer._aNormalPositionNozzle);
GLES20.glUniform3f(GLES20Renderer._uLightPositionLocationNozzle, GLES20Renderer._LightPosInEyeSpace[0], GLES20Renderer._LightPosInEyeSpace[1], GLES20Renderer._LightPosInEyeSpace[2]);
GLES20.glUniformMatrix4fv(GLES20Renderer._uMVPLocationNozzle, 1, false, GLES20Renderer._MVPMatrixNozzle, 0);
GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, GLES20Renderer._nozzleBuffers[3]);
GLES20.glDrawElements(GLES20.GL_TRIANGLES, 144, GLES20.GL_UNSIGNED_SHORT, 0);
/////////////////////////////
// program for player end //
/////////////////////////////