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feat(physics): 16 - a rock's own shape: phys_convex (Jolt's convex hull of a point cloud) and phys_scaled (one hull, every rock of that shape at its own size); the libraries rebuilt on the Mac and the PC (still KERNEL32 alone); hull_shape_test holds the scale and that a yaw turns a body the way a renderer turns an instance

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Orkun ÇAKILKAYA 2026-09-27 15:22:30 +03:00
parent bb2a4c10af
commit dd86dce171
9 changed files with 80 additions and 7 deletions
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12
packages/ludic.physics/shapes.ludic
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@ -59,6 +59,18 @@ export function phys_cylinder(physics_st: mut PhysicsState, half_h: float, r: fl
# a boulder: a dome r across and h tall, standing on its origin
export function phys_dome(physics_st: mut PhysicsState, r: float, h: float) -> int { return ph_keep(physics_st, jph_shape_dome(r, h)) }
# a rock: the convex hull of n points (x, y, z) about its origin, its edges rounded by 2 cm
export function phys_convex(physics_st: mut PhysicsState, v: []float, n: int) -> int {
if n < 4 or len(v) < n * 3 { return -1 }
return ph_keep(physics_st, jph_shape_convex(v, n, 0.02))
}
# another shape k times its size, so one hull serves every boulder of its shape
export function phys_scaled(physics_st: mut PhysicsState, shape: int, k: float) -> int {
let s = ph_shape(physics_st, shape)
if s == null { return -1 }
return ph_keep(physics_st, jph_shape_scaled(s, k))
}
# another shape moved and turned about y inside its body (a post whose foot is its origin)
export function phys_offset(physics_st: mut PhysicsState, shape: int, x: float, y: float, z: float, yaw: float) -> int {
let s = ph_shape(physics_st, shape)