小编rdn*_*ega的帖子

我正在尝试在屏幕上绘制具有Alpha通道的多个六边形.图像是这样的:

所以,我将纹理加载到程序中,这没关系.当它运行时,alpha通道与背景颜色混合即可,但是当两个六边形重叠时,重叠的部分将成为背景的颜色!图片下方:

当然,这不是我预期的效果.我希望它们重叠而不将此背景绘制在其他纹理上.这是我的绘图代码:

    GLES20.glUseProgram(Program);

    hVertex  = GLES20.glGetAttribLocation(Program,"vPosition");
    hColor   = GLES20.glGetUniformLocation(Program, "vColor");
    uTexture = GLES20.glGetUniformLocation(Program, "u_Texture");
    hTexture = GLES20.glGetAttribLocation(Program, "a_TexCoordinate");
    hMatrix  = GLES20.glGetUniformLocation(Program, "uMVPMatrix");

    GLES20.glVertexAttribPointer(hVertex, 3, GLES20.GL_FLOAT, false, 0, bVertex);
    GLES20.glEnableVertexAttribArray(hVertex);
    GLES20.glUniform4fv(hColor, 1, Color, 0);
    GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, hTexture);
    GLES20.glUniform1i(uTexture, 0);
    GLES20.glVertexAttribPointer(hTexture, 2, GLES20.GL_FLOAT, false, 0, bTexture);
    GLES20.glEnableVertexAttribArray(hTexture);

    GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
    GLES20.glEnable(GLES20.GL_BLEND);

    x=-1;y=0;z=0;
    for (int i=0;i<10;i++) {
        Matrix.setIdentityM(ModelMatrix, 0);
        Matrix.translateM(ModelMatrix, 0, x, y, z);
        x+=0.6f;
        Matrix.multiplyMM(ModelMatrix, 0, ModelMatrix, 0, ProjectionMatrix, 0);
        GLES20.glUniformMatrix4fv(hMatrix, 1, false, ModelMatrix, 0);
        GLES20.glDrawElements(GLES20.GL_TRIANGLES, DrawOrder.length, GLES20.GL_UNSIGNED_SHORT, bDrawOrder);
    }

    GLES20.glDisable(GLES20.GL_BLEND);
    GLES20.glDisableVertexAttribArray(hVertex); …