小编Vil*_*ois的帖子

我有一个Collada模型,我加载到SceneKit.当我在模型上执行hittest时,我能够检索被击中的模型的纹理坐标.

使用这些纹理坐标,我应该能够用颜色替换纹理坐标.所以这种方式我应该可以在模型上绘制

如果我错了,请纠正我.

到目前为止我读了很多文章,但我没有把我的着色器弄好.(虽然我确实得到了一些时髦的效果;-)

我的顶点着色器:

precision highp float;

attribute vec4 position;
attribute vec2 textureCoordinate;
attribute vec2 aTexureCoordForColor; //coordinates from the hittest

uniform mat4 modelViewProjection;

varying vec2 aTexureCoordForColorVarying; // passing to the fragment shader here
varying vec2 texCoord;

void main(void) {
    // Pass along to the fragment shader
    texCoord = textureCoordinate;
    aTexureCoordForColorVarying = aTexureCoordForColor; //assigning here
    // output the projected position
    gl_Position = modelViewProjection * position;
}

我的片段着色器

precision highp float;

uniform sampler2D yourTexture;

uniform vec2 uResolution;
uniform int uTexureCoordsCount;

varying …