Fix suspension, adjust car collision

assets/car_convex.obj

@@ -1,60 +1,55 @@
-# Blender 4.4.0
+# Blender 4.4.1
 # www.blender.org
 o Object_5
-v -0.809354 0.177497 1.254802
+v -0.812577 0.172395 1.254792
-v -0.651350 -0.191484 1.848460
+v -0.646673 -0.190612 1.848713
 v -0.666983 -0.006338 1.874366
 v -0.635056 0.256211 1.783894
 v -0.508939 0.803110 -0.009132
 v -0.769510 0.352081 -1.291787
-v -0.764234 0.008374 -1.721554
+v -0.761933 0.013607 -1.722252
-v 0.681867 -0.190619 1.840616
+v 0.677186 -0.189706 1.840916
 v -0.590011 0.087673 1.933771
-v -0.664853 -0.223466 -1.336528
+v -0.669674 -0.180060 -1.336290
-v -0.470980 -0.291467 1.091400
-v 0.501574 -0.290622 1.087594
 v -0.512564 0.833925 -0.989792
 v -0.627160 0.507336 -2.050498
-v -0.682346 0.022742 -2.244179
+v -0.682347 0.022719 -2.244187
 v 0.678533 0.090349 1.926879
-v 0.695498 -0.222497 -1.337535
+v 0.700321 -0.179143 -1.337300
-v 0.794826 0.008397 -1.721544
+v 0.792520 0.013658 -1.722244
-v 0.839974 0.177449 1.254803
+v 0.843208 0.172325 1.254793
 v 0.665671 0.258142 1.777555
 v 0.539534 0.803109 -0.009139
 v 0.543159 0.833925 -0.989791
 v 0.657754 0.507336 -2.050497
-v 0.712874 0.023341 -2.243943
+v 0.712870 0.023363 -2.243935
 v 0.800105 0.352079 -1.291788
 s 0
 f 1 2 3
 f 1 3 4
 f 1 4 5
-f 25 22 21 19
+f 23 20 19 17
 f 1 6 7
-f 18 19 8 17
+f 16 17 8 15
 f 2 9 3
-f 2 10 11
-f 17 12 11 10
 f 3 9 4
-f 9 16 20 4
+f 9 14 18 4
-f 6 13 14
+f 6 11 12
-f 23 25 18 24
+f 21 23 16 22
-f 7 15 10
+f 7 13 10
-f 8 12 17
+f 8 17 14
-f 8 19 16
+f 8 14 9 2
-f 8 16 9 2
+f 12 21 22 13
-f 14 23 24 15
+f 20 11 5 19
-f 22 13 5 21
+f 15 10 13 22
-f 17 10 15 24
+f 14 17 18
-f 16 19 20
+f 15 22 16
-f 17 24 18
+f 16 23 17
-f 18 25 19
 f 7 10 2 1
-f 19 21 20
+f 17 19 18
-f 22 25 23
+f 20 23 21
-f 12 8 2 11
+f 5 11 6 1
-f 5 13 6 1
+f 5 4 18 19
-f 5 4 20 21
+f 13 7 6 12
-f 15 7 6 14
+f 12 11 20 21
-f 14 13 22 23
+f 8 2 10 15

game/game.odin

@@ -325,13 +325,13 @@ update_runtime_world :: proc(runtime_world: ^Runtime_World, dt: f32) {
 
 		wheel_extent_x_front := f32(1.355) / 2
 		wheel_extent_x_back := f32(1.345) / 2
-		wheel_y := f32(-0.1)
+		wheel_y := f32(-0.4)
-		rest := f32(1)
+		rest := f32(0.2)
-		natural_frequency := f32(0.35)
+		natural_frequency := f32(1.2)
-		damping := f32(0.07)
+		damping := f32(0.15)
 		radius := f32(0.2888)
-		wheel_front_z := f32(1.3)
+		wheel_front_z := f32(1.35)
-		wheel_back_z := f32(-1.1)
+		wheel_back_z := f32(-1.05)
 		wheel_mass := f32(14)
 
 		wheel_fl := physics.immediate_suspension_constraint(
@@ -408,7 +408,7 @@ update_runtime_world :: proc(runtime_world: ^Runtime_World, dt: f32) {
 				axle = physics.Drive_Axle_Config {
 					wheels = {wheel_rl, wheel_rr},
 					wheel_count = 2,
-					diff_type = .Open,
+					diff_type = .Fixed,
 					final_drive_ratio = 4.1,
 				},
 			},

game/physics/collision/collision.odin

@@ -633,7 +633,7 @@ intersect_segment_plane :: proc(
 
 	if t >= 0 && t <= 1 {
 		point = segment[0] + t * ab
-		return t, point, true
+		return t * linalg.length(ab), point, true
 	}
 
 	return linalg.length(ab), segment[1], false