commit 353c6cfeee1e6c1ed4eb1508161fbd270e2f9792 parent 933299a586d6f761cf6dc84ef733cde2e72b0f00 Author: William Casarin <jb55@jb55.com> Date: Sat, 4 Aug 2018 19:12:34 -0700 simple version of nodes repelling each other Diffstat:
| M | update.c | | | 30 | ++++++++++++++++++++++++------ |
1 file changed, 24 insertions(+), 6 deletions(-)
diff --git a/update.c b/update.c @@ -58,16 +58,34 @@ void update(struct ln *ln, double dt) double dx = n2->x - n1->x; double dy = n2->y - n1->y; - /* double d = sqrt(dx*dx + dy*dy); */ + double d = sqrt(dx*dx + dy*dy); - const double scale = 0.001; + static const double mindist = 100.0; + if (d < mindist) { + double nx = dx / d; + double ny = dy / d; - n1->vx += dx * scale; - n1->vy += dy * scale; + double nnx = (d - mindist) * nx; + double nny = (d - mindist) * ny; - n2->vx += -dx * scale; - n2->vy += -dy * scale; + double mx = nnx; + double my = nny; + n1->vx += mx; + n1->vy += my; + + n2->vx -= mx; + n2->vy -= my; + } + else { + const double scale = 0.01; + + n1->vx += dx * scale; + n1->vy += dy * scale; + + n2->vx += -dx * scale; + n2->vy += -dy * scale; + } } for (u32 i = 0; i < ln->node_count; i++) {