Houdini 16.5 Nodes VOP nodes

Color Map VOP node

Looks up a single sample of RGB or RGBA color from a disk image.

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This operator looks up a single sample of RGB or RGBA color from a disk image. If the image does not have an alpha channel associated with it (e.g. a JPEG image) and the operator returns RGBA, the alpha component will be set to 1.

Note

This VOP uses point sampling and does not perform filtering of the texture.

Parameters

Signature

RGB or RGBA values.

Color Map

Image file used for look-up.

U

Image u-coordinate.

V

Image v-coordinate.

Wrap

Determines how the image is evaluated when the texture coordinates are outside the range 0 to 1. The options are:

Repeat

(string value repeat). The image map repeats outside the range 0 to 1. Basically, the integer component of the texture coordinate is ignored.

Streak

(string value streak). Texture coordinates are clamped to the 0 to 1 range.

Decal

(string value decal). Coordinates outside the range 0 to 1 will evaluate to the border color rather than an image color.

Border Color

Border color when Decal wrapping is used.

Examples

The following examples include this node.

grass

This example simulates grass being pushed down by an RBD object. Fur Objects are used to represent the blades of grass and Wire Objects are used to simulate the motion. When a single Fur Object is used to represent the grass, neighbouring blades of grass will have similar motion. Additional objects with different stiffness values can be used to make the motion less uniform. When "Complex Mode" is enabled, two objects are used to represent the grass. The stiffness of each set of curves can be controlled by adjusting the "Angular Spring Constant" and "Linear Spring Constant" parameters on the corresponding Wire Objects.

FurPipelineExample Example for Fur geometry node

This example illustrates how custom shaders can be used to define the appearance of fur generated by the Fur SOP.

See also

VOP nodes