VEX —— Functions|Volume

原创已于 2023-12-04 12:04:37 修改 · 297 阅读

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#Houdini

于 2023-09-27 20:43:06 首次发布

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该博客主要围绕Houdini展开，详细列举了如volume、volumecubicsample等一系列与volume相关的功能，这些功能在Houdini的使用中可能具有重要作用，为相关使用者提供了清晰的参考。

volume

float volume(vector pos, ...)

volumecubicsample

float volumecubicsample(<geometry>geometry, int primnum, vector pos)
float volumecubicsample(<geometry>geometry, string volumename, vector pos)
float volumecubicsample(<geometry>geometry, int primnum, vector pos, vector &grad)
float volumecubicsample(<geometry>geometry, string volumename, vector pos, vector &grad)
float volumecubicsample(<geometry>geometry, int primnum, vector pos, vector &grad, matrix3 &hess)
float volumecubicsample(<geometry>geometry, string volumename, vector pos, vector &grad, matrix3 &hess)

volumecubicsamplev

vector volumecubicsamplev(<geometry>geometry, int primnum, vector pos)
vector volumecubicsamplev(<geometry>geometry, string volumename, vector pos)
vector volumecubicsamplev(<geometry>geometry, int primnum, vector pos, matrix3 &grad)
vector volumecubicsamplev(<geometry>geometry, string volumename, vector pos, matrix3 &grad)
vector volumecubicsamplev(<geometry>geometry, int primnum, vector pos, matrix3 &grad, matrix3 &hessX, matrix3 &hessY, matrix3 &hessZ)
vector volumecubicsamplev(<geometry>geometry, string volumename, vector pos, matrix3 &grad, matrix3 &hessX, matrix3 &hessY, matrix3 &hessZ)

volumegradient

vector volumegradient(<geometry>geometry, int primnum, vector pos)
vector volumegradient(<geometry>geometry, string volumename, vector pos)

volumeindex

float volumeindex(<geometry>geometry, int primnum, vector voxel)
float volumeindex(<geometry>geometry, string volumename, vector voxel)

volumeindexactive

int volumeindexactive(<geometry>geometry, int primnum, vector voxel)
int volumeindexactive(<geometry>geometry, string volumename, vector voxel)

volumeindexorigin

vector volumeindexorigin(<geometry>geometry, int primnum)
vector volumeindexorigin(<geometry>geometry, string volumename)

volumeindextopos

vector volumeindextopos(<geometry>geometry, int primnum, vector voxel)
vector volumeindextopos(<geometry>geometry, string volumename, vector voxel)

//每体素位置
vector res = volumeres(1,0);
for(int ix=0; ix<res.x; ix++){
    for(int iy=0; iy<res.y; iy++){
        for(int iz=0; iz<res.z; iz++){
            vector pos = volumeindextopos(1, 0, set(ix, iy, iz));
            addpoint(0, pos);
        }
    }
}

//类似上一示例
@density; //不可省略
int pt = addpoint(0, @P);
setpointattrib(0, 'density', pt, @density);

volumeindexv

vector volumeindexv(<geometry>geometry, int primnum, vector voxel)
vector volumeindexv(<geometry>geometry, string volumename, vector voxel)

volumepostoindex

vector volumepostoindex(<geometry>geometry, int primnum, vector position)
vector volumepostoindex(<geometry>geometry, string volumename, vector position)

volumeres

vector volumeres(<geometry>geometry, int primnum)
vector volumeres(<geometry>geometry, string volumename)

volumesample

float volumesample(<geometry>geometry, int primnum, vector pos)
float volumesample(<geometry>geometry, string volumename, vector pos)

volumesamplev

vector volumesamplev(<geometry>geometry, int primnum, vector pos)
vector volumesamplev(<geometry>geometry, string volumename, vector pos)

volumesmoothsample

float volumesmoothsample(<geometry>geometry, int primnum, vector pos)
float volumesmoothsample(<geometry>geometry, string volumename, vector pos)
float volumesmoothsample(<geometry>geometry, int primnum, vector pos, vector &grad)
float volumesmoothsample(<geometry>geometry, string volumename, vector pos, vector &grad)
float volumesmoothsample(<geometry>geometry, int primnum, vector pos, vector &grad, matrix3 &hess)
float volumesmoothsample(<geometry>geometry, string volumename, vector pos, vector &grad, matrix3 &hess)

volumesmoothsamplev

vector volumesmoothsamplev(<geometry>geometry, int primnum, vector pos)
vector volumesmoothsamplev(<geometry>geometry, string volumename, vector pos)
vector volumesmoothsamplev(<geometry>geometry, int primnum, vector pos, matrix3 &grad)
vector volumesmoothsamplev(<geometry>geometry, string volumename, vector pos, matrix3 &grad)
vector volumesmoothsamplev(<geometry>geometry, int primnum, vector pos, matrix3 &grad, matrix3 &hessX, matrix3 &hessY, matrix3 &hessZ)
vector volumesmoothsamplev(<geometry>geometry, string volumename, vector pos, matrix3 &grad, matrix3 &hessX, matrix3 &hessY, matrix3 &hessZ)

volumevoxeldiameter

float volumevoxeldiameter(<geometry>geometry, int primnum)
float volumevoxeldiameter(<geometry>geometry, string primname)