Question

我正在使用GL20.GL_POINTS拍照。点的归属之一是变量（代码中的'vKind'）。当属性改变时，我应该同时改变纹理。以下是我的方法。但我得到了低fps。我该怎么办？任何帮助谢谢！

        final String fragmentShader = "precision highp float;\n"
            + "uniform sampler2D u_texture0;\n" // diffuse texture for
            + "uniform sampler2D u_texture1;\n" // diffuse texture for
            + "uniform sampler2D u_texture2;\n" // diffuse texture for
            + "uniform sampler2D u_texture3;\n" // diffuse texture for
            + "uniform sampler2D u_texture4;\n" // diffuse texture for
            + "uniform sampler2D u_texture5;\n" // diffuse texture for
            + "uniform sampler2D u_texture6;\n" // diffuse texture for
            + "uniform sampler2D u_texture7;\n" // diffuse texture for
            + "varying float vRotation;\n"
            + "varying float vKind;\n"
            + "varying vec4 vColor;\n" // input color from vertex shader
            + "void main() {\n"
            + "highp vec2 center = vec2(0.5, 0.5);\n"
            // Translate the center of the point the origin.
            + "highp vec2 centeredPoint = gl_PointCoord - center;\n"
            // Create a rotation matrix using the provided angle
            + "highp mat2 rotation = mat2(cos(vRotation), sin(vRotation),\n"
            + "-sin(vRotation), cos(vRotation)); \n"
            // Perform the rotation.
            + "centeredPoint = centeredPoint*rotation ;\n"
            // Translate the point back to its original position and use
            // that point
            // to get your texture color.
            + "if(vKind==0.0)\n"
            + "gl_FragColor = texture2D(u_texture0, centeredPoint + center);\n"
            + "else if(vKind==1.0)\n"
            + "gl_FragColor = texture2D(u_texture1, centeredPoint + center);\n"
            + "else if(vKind==2.0)\n"
            + "gl_FragColor = texture2D(u_texture2, centeredPoint + center);\n"
            + "else if(vKind==3.0)\n"
            + "gl_FragColor = texture2D(u_texture3, centeredPoint + center);\n"
            + "else if(vKind==4.0)\n"
            + "gl_FragColor = texture2D(u_texture4, centeredPoint + center);\n"
            + "else if(vKind==5.0)\n"
            + "gl_FragColor = texture2D(u_texture5, centeredPoint + center);\n"
            + "else if(vKind==6.0)\n"
            + "gl_FragColor = texture2D(u_texture6, centeredPoint + center);\n"
            + "else\n"
            + "gl_FragColor = texture2D(u_texture7, centeredPoint + center);\n"
            + "gl_FragColor *= vColor;\n"

            // +
            // " gl_FragColor.a = (gl_FragColor.b >= 0.5) ? gl_FragColor.a  : 0.0;\n"
            + "}\n";

Answer 1

首先尝试分析情况，如果纹理确实让你失望：注释除1纹理之外的所有纹理并使所有if语句调用相同的纹理。然后在确认后考虑两件事：

由于您正在绘制积分，您真的需要varying vKind或uniform。您可以使用8个绘制调用，将您的点分成CPU上的8个数组，具体取决于它们应使用的纹理，然后在片段着色器中仅使用1个纹理，并在8个绘制调用中的每一个之前绑定正确的纹理。
如果您确实需要所有这些纹理数据，请尝试查看如何使用图集（将多个纹理合并为一个）并尝试尽可能减少纹理数量。

片段着色器中的多个纹理。我得到了一个低fps

1 个答案: