TouchDesigner常用表达

1.常用python语句表达,已有前辈整理出来，可点击以下链接
https://blog.youkuaiyun.com/qq_29859497/article/details/88364973
2.缩写的表达式代表的意义
$TX, $TY, $TZ - The point position

$PT - The point number.

$NPT - The total number of points.

$CEX, $CEY, $CEZ - The centroid of the SOP.

$TX, $TY, $TZ - The point position.

$BBX, $BBY, $BBZ - The relative position of the point with respect to the bounding box. These variables will always be within 0 to 1.

$NX, $NY, $NZ - The normal of the point.

$MAPU, $MAPV, $MAPW - The texture coordinates of the point.

$CR, $CG, $CB - Red, green and blue color of the point.

$CA - The alpha value for the point.

$UPX, $UPY, $UPZ - The values of the up vector attribute for the first source.

$UPX2, $UPY2, $UPZ2 - The values of the up vector attribute for the second source.
Particle Specific Variables

$PSCALE - The multiplier for the scale of the particles.

$AGE - The number of seconds a particle has been alive.

$MASS - The mass of the point.

$DRAG - The drag coefficient for the point.

$LIFE - Percentage of life used for a point/particle.

$DIST - Distance of the point to an intersected surface. This attribute is created by the Ray SOP.

$VX , $VY, $VZ - Velocity of the point.

$ID - The particle ID associated with the point. This variable is only defined if the point is associated with a particle system that has the particle ID attribute enabled.