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asim: expose friction and bounciness

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This commit is contained in:
luboslenco
2026-05-11 20:25:36 +02:00
parent cdbd882b49
commit d3edea9c3e
2 changed files with 13 additions and 3 deletions
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base/sources/libs/asim.c
+11 -3
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@@ -47,6 +47,8 @@ static physics_pair_t ppairs[MAX_SPHERES];
static float ppair_best_dist;
static mesh_t mesh;
static aabb_t root_bounds = {{-10, -10, -10}, {10, 10, 10}};
static float asim_bounciness = 0.0f;
static float asim_friction = 0.01f;
static inline aabb_t merge_aabbs(aabb_t a, aabb_t b) {
return (aabb_t){.min = {fminf(a.min.x, b.min.x), fminf(a.min.y, b.min.y), fminf(a.min.z, b.min.z)},
@@ -122,9 +124,7 @@ static void collide_sphere_triangle(sphere_t *s, int si, triangle_t *t) {
if (v_dot_n < 0.0f) {
vec4_t n_vel = vec4_mult(t->normal, v_dot_n);
vec4_t t_vel = vec4_sub(s->velocity, n_vel);
float restitution = 0.0f;
float friction = 0.99f;
s->velocity = vec4_add(vec4_mult(n_vel, -restitution), vec4_mult(t_vel, friction));
s->velocity = vec4_add(vec4_mult(n_vel, -asim_bounciness), vec4_mult(t_vel, 1.0f - asim_friction));
}
vec4_t contact_point = vec4_sub(s->position, vec4_mult(t->normal, s->radius));
@@ -336,3 +336,11 @@ float asim_body_get_speed(void *body) {
return sqrtf(spheres[slot].velocity.x * spheres[slot].velocity.x + spheres[slot].velocity.y * spheres[slot].velocity.y +
spheres[slot].velocity.z * spheres[slot].velocity.z);
}
void asim_set_friction(float v) {
asim_friction = v * 0.1f;
}
void asim_set_bounciness(float v) {
asim_bounciness = v;
}
base/sources/libs/asim.h
+2
View File
@@ -24,3 +24,5 @@ void asim_body_get_rot(void *body, quat_t *rot);
void asim_body_sync_transform(void *body, vec4_t pos, quat_t rot);
void asim_body_remove(void *body);
float asim_body_get_speed(void *body);
void asim_set_friction(float v);
void asim_set_bounciness(float v);