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feat(physics): phys_resolve (two passes, the place kept) - a contact more up than across is ground under the feet, not a wall

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-26 23:47:29 +03:00
parent 1c814464c5
commit 28c54e4b39
6 changed files with 58 additions and 5 deletions
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22
packages/ludic.physics/tests/physics_test.ludic
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@ -110,4 +110,26 @@ program PhysicsTest {
expect(Math.abs(phys_step_top(physics_st, 5.0, 0.0, 0.35, 2.9, 0.55, PHYS_M_STATIC) - 3.0) < 0.02)
phys_close(physics_st)
}
test "a body is resolved clear of a post, and standing on a rock is not being in it" (physics_st: mut PhysicsState) {
ground(physics_st)
let post = phys_offset(physics_st, phys_cylinder(physics_st, 1.0, 0.3), 0.0, 1.0, 0.0, 0.0)
phys_static_add(physics_st, post, 0.0, 0.0, 0.0, 0.0)
let rock = phys_offset(physics_st, phys_cylinder(physics_st, 0.2, 1.0), 0.0, 0.2, 0.0, 0.0)
phys_static_add(physics_st, rock, 5.0, 0.0, 0.0, 0.0)
phys_static_add(physics_st, phys_dome(physics_st, 1.5, 0.6), -5.0, 0.0, 0.0, 0.0)
phys_settle(physics_st)
expect(phys_resolve(physics_st, 0.4, 0.1, 0.35, 0.0, 1.8, PHYS_M_STATIC))
let dx = phys_resolved_x(physics_st)
let dz = phys_resolved_z(physics_st)
expect(Math.sqrt(dx * dx + dz * dz) > 0.64)
expect(not phys_resolve(physics_st, 5.2, 0.0, 0.35, 0.4, 2.2, PHYS_M_STATIC))
expect_eq(phys_resolved_x(physics_st), 5.2)
expect(phys_resolve(physics_st, 6.3, 0.0, 0.35, 0.0, 1.8, PHYS_M_STATIC))
expect(phys_resolved_x(physics_st) > 6.34)
let top = phys_step_top(physics_st, -5.3, 0.0, 0.35, 0.0, 0.7, PHYS_M_STATIC)
expect(top > 0.4)
expect(not phys_resolve(physics_st, -5.3, 0.0, 0.35, top, top + 1.8, PHYS_M_STATIC))
phys_close(physics_st)
}
}