Houdini 22.0 Nodes Geometry nodes

Test Geometry: Capybara geometry node

Creates a capybara, which can be used as test geometry.

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Since 20.0

The capybara is a cute oversized rodent equipped with bones and muscles. It provides a starting point for prototyping and experimenting with rigging and muscle systems, and is representative of the type of geometry you may come across, with multiple components, holes, and non-perfect geometry. The skin has capture weights, so you can send Cappy on adventures without starting up the simulators.

Many are surprised that Cappy is bipedal, but they shouldn’t be because Cappy demonstrated excellent brachiation on the monkey bars in our test environment! And, as we all know, brachiation is an exaptation to bipedalism, so this powerful walk cycle should come as little surprise.

Parameters

Translate

Position of the center of the feet.

Rotate

Rotation of the geometry about its center.

Uniform Scale

Uniform scaling.

Output

The geometry to output on the first output.

Skin Surface

The surface of the capybara with capture weights.

Muscle Surfaces

Semi-anatomical muscles surfaces.

Bone Surfaces

Semi-anatomical bones with rigidly captured weights.

Fur

Curves to provide fur. Use the Guide Deform SOP to deform these to an animation.

GSplats

GSplats providing both the fur, skin, and lighting baked together. Use the Surface Deform SOP to deform these to an animation.

Add Shader

When turned on, attaches a default shader to render the capybara with embedded texture maps.

Apply Normal Map

When turned on, uses normal maps in the embedded shader. Normal maps make for a more interesting capybara, but triggers runtime tangent computation that is slow.

Apply Subsurface

When turned on, uses subsurface scattering for the skin. This creates the glow from light entering the skin, but requires more samples to create a final rendered image.

Animation

The capture pose and animation pose outputs can be wired to a Joint Deform SOP to get an animated capybara.

Output Motion Clip

When turned on, outputs a motion clip on the third output rather than a single pose. A MotionClip Evaluate SOP must be used to pick a specific pose for deformation, but this allows layering of the clip with other motion clip tools.

Animation Clip

The animation for the third output.

Walk

A looping cycle of a brave capybara walking in place.

Clothes Line

The capybara, wrestling an imaginary opponent in an imaginary ring, performs what it claims is a “clothes line” technique. Choreographic researchers are still attempting to deduce what was in the mind of Cappy at the time.

Elbow Drop

Standing on invisible ropes; the capybara delivers a dangerous elbow-drop.

Fall

Cappy demonstrating the brachiation capabilities capybaras are renowned for. Do not run for too long or the capybara may lose grip and fall!

Frame

The frame to extract for the animation pose.

Apply Locomotion

When turned on, makes the capybara move forward as it walks.

Number of Loops

When Apply Locomotion is turned on, this is the number of loops of the walk cycle to play.

Outputs

Rest Geometry

Skin geometry with capture weights (boneCapture point attribute).

Capture Pose

Rest skeleton geometry.

Animated Pose

Animated skeleton geometry.

See also

Geometry nodes