giers10/webeditor3d
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add function to create Rapier heightfield heights from collider data

Browse Source
This commit is contained in:
Victor Giers
2026-04-04 08:32:53 +02:00
parent 7df881227a
commit ca2f5b64aa
1 changed files with 16 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/runtime-three/rapier-collision-world.ts
View File

@@ -64,6 +64,21 @@ function scaleBoundsCenter(bounds: { min: Vec3; max: Vec3 }, scale: Vec3): Vec3
};
}
function createRapierHeightfieldHeights(collider: GeneratedModelHeightfieldCollider): Float32Array {
const heights = new Float32Array(collider.heights.length);
// Rapier's heightfield samples are column-major, with the Z axis varying
// fastest inside each X column. Our generated collider stores X-major rows
// for easier editor/debug mesh reconstruction, so transpose here.
for (let zIndex = 0; zIndex < collider.cols; zIndex += 1) {
for (let xIndex = 0; xIndex < collider.rows; xIndex += 1) {
heights[zIndex + xIndex * collider.cols] = collider.heights[xIndex + zIndex * collider.rows];
}
}
return heights;
}
function createFixedBodyForModelCollider(world: RAPIER.World, collider: GeneratedModelCollider): RAPIER.RigidBody {
return world.createRigidBody(
RAPIER.RigidBodyDesc.fixed()
@@ -141,7 +156,7 @@ function attachTerrainModelCollider(world: RAPIER.World, collider: GeneratedMode
world.createCollider(
// Rapier expects the number of grid subdivisions here, while our generated
// collider stores the sampled height grid dimensions.
RAPIER.ColliderDesc.heightfield(rowSubdivisions, colSubdivisions, collider.heights, {
RAPIER.ColliderDesc.heightfield(rowSubdivisions, colSubdivisions, createRapierHeightfieldHeights(collider), {
x: (collider.maxX - collider.minX) * collider.transform.scale.x,
y: collider.transform.scale.y,
z: (collider.maxZ - collider.minZ) * collider.transform.scale.z