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我正在使用OpenGL ES开发Android系统,我绘制了一些立方体,然后使用glColor4f更改颜色。现在,我想要给立方体带来更逼真的效果,所以我创建了一个单色8位深度,64x64像素大小的PNG文件。我加载了一个纹理,这里是我的问题,这是将颜色和纹理结合起来以获得彩色和纹理立方体到屏幕上的方式吗?OpenGL,如何将单色纹理设置为彩色形状?
我不是基于OpenGL的专家,我想这一点:
上创建:
public void asignBitmap(GL10 gl, Bitmap bitmap)
{
int[] textures = new int[1];
gl.glGenTextures(1, textures, 0);
mTexture = textures[0];
gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexture);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE);
gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_REPLACE);
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_ALPHA, bitmap, 0);
ByteBuffer tbb = ByteBuffer.allocateDirect(texCoords.length * 4);
tbb.order(ByteOrder.nativeOrder());
mTexBuffer = tbb.asFloatBuffer();
for (int i = 0; i < 48; i++) mTexBuffer.put(texCoords[i]);
mTexBuffer.position(0);
}
而且OnDraw中:
public void draw(GL10 gl, int alphawires) {
gl.glColor4f(1.0f, 0.0f, 0.0f, 0.5f); //RED
gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexture);
gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
gl.glEnable(GL10.GL_TEXTURE_2D);
gl.glEnable(GL10.GL_BLEND);
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTexBuffer);
//Set the face rotation
gl.glFrontFace(GL10.GL_CW);
//Point to our buffers
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
//Enable the vertex and color state
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
//Draw the vertices as triangles, based on the Index Buffer information
gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE, indexBuffer);
//Disable the client state before leaving
gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
gl.glDisable(GL10.GL_BLEND);
gl.glDisable(GL10.GL_TEXTURE_2D);
}
我甚至不知道我是否有使用混合选项,因为我不需要透明度,但它是一个加号:)