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dmnsgn avatar dmnsgn commented on June 24, 2024

Revived instancing example and use it to demo attribute.dirty: 13ed415#diff-b9928ed31347ca26a5db354cc663e6275c0a7266edafd38ca237539ca95d2cd0R184-R188

The main change in the system are:

  • checking cached object difference upfront and updating properties:

pex-renderer/systems/geometry.js

Lines 53 to 65 in 13ed415

const geometryDirty = cachedGeom.geometry !== geometry;
// Cache properties
if (geometryDirty) {
if (geometrySystem.debug) {
console.debug("geometry-system", "update geometry", id, geometry);
}
cachedGeom.geometry = geometry;
cachedGeom.instances = geometry.instances;
cachedGeom.count = geometry.count;
cachedGeom.primitive = geometry.primitive;
}

  • checking for both upfront whole geometryDirty and attribute.dirty to skip update:

pex-renderer/systems/geometry.js

Line 92 in 13ed415

if (!(geometryDirty || attributeValue.dirty)) continue;

from pex-renderer.

dmnsgn avatar dmnsgn commented on June 24, 2024

Performance in example (updating offsets/rotations/colors only instead of positions/normals/uvs/cells/offsets/scales/rotations/colors): 10ms -> 3.5ms

from pex-renderer.

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