added convex hull and trimesh colliders. Fixed physics edit mode bugs. Added debug drawing for all supported collision types.

18 files changed, 463 insertions, 39 deletions

diff --git a/editor.c b/editor.c
index 2591cc1..18cd918 100644
--- a/editor.c
+++ b/editor.c
@@ -3184,24 +3184,19 @@ panel_properties(EditorPanelContainer container, bool input) {
 			main_cam.input = false;
 			main_cam.update = false;
 
-			u64 id = entity_id_from_pid(ent->pid);
-
-			f32 view_height = 10.0f *
-				tanf(main_cam.perspective_fov *
-					DEG2RAD * 0.5f);
-
-			cam_focus(entity_world_pos(id), 5.0f, view_height);
-
 			ed.physics_pid = ent->pid;
 			ed.physics_body = -1;
 			ed.physics_shape = -1;
 			ed.physics_scroll = (Vec2){0};
 			ed.prev_mode = ed.mode;
+			ed.panel[ED_PNL_LEFT].enabled = true;
+			ed.panel[ED_PNL_RIGHT].enabled = true;
 			ed.mode = ED_MODE_PHYSICS;
 			ed.panel[ED_PNL_LEFT].type =
 				ED_PNL_TYPE_PHYSICS_ELEMENTS;
 			ed.panel[ED_PNL_RIGHT].type =
 				ED_PNL_TYPE_PHYSICS_PROPERTIES;
+			editor_focus_selection();
 
 			edit.focus = 0;
 			add_open = false;
@@ -4251,6 +4246,66 @@ panel_physics_shape(PanelEdit *edit, Rect row,
 }
 
 static void
+physics_shape_model_geometry(
+                PhysicsShape *shape,
+                const Model *model,
+		u32 point_cnt,
+		u32 idx_cnt) {
+	bool trimesh = shape->tag == PHYS_SHAPE_STATIC_TRIMESH;
+
+	Vec3 *points = malloc(point_cnt * sizeof(*points));
+	u32 *indices = NULL;
+
+	if (trimesh) {
+		indices = malloc(idx_cnt * sizeof(*indices));
+	}
+
+	if (!points || (trimesh && !indices)) {
+		perror("model collision allocation failed");
+		exit(EXIT_FAILURE);
+	}
+
+	u32 point_offset = 0;
+	u32 index_offset = 0;
+
+	for (int i = 0; i < model->meshCount; ++i) {
+		const Mesh *mesh = &model->meshes[i];
+
+		for (int v = 0; v < mesh->vertexCount; ++v) {
+			points[point_offset + v] = (Vec3){
+				mesh->vertices[v * 3],
+				mesh->vertices[v * 3 + 1],
+				mesh->vertices[v * 3 + 2],
+			};
+		}
+
+		if (trimesh) {
+			u32 count = (u32)mesh->triangleCount * 3;
+
+			for (u32 k = 0; k < count; ++k) {
+				u32 index = mesh->indices
+					? (u32)mesh->indices[k]
+					: k;
+
+				indices[index_offset++] = point_offset + index;
+			}
+		}
+
+		point_offset += (u32)mesh->vertexCount;
+	}
+
+	if (trimesh) {
+		shape->TriMesh.points = points;
+		shape->TriMesh.indices = indices;
+		shape->TriMesh.point_cnt = point_cnt;
+		shape->TriMesh.idx_cnt = idx_cnt;
+	} else {
+		shape->ConvexHull.points = points;
+		shape->ConvexHull.point_cnt = point_cnt;
+	}
+}
+
+static void
 panel_physics_properties(EditorPanelContainer container, bool input) {
 	Rect bounds = ed.panel[container].bounds;
 
@@ -4518,10 +4573,20 @@ panel_physics_properties(EditorPanelContainer container, bool input) {
 		}
 
 		bool fit_model = GuiButton(info, "Add Model Box");
+
+		info.y += 30;
+		bool add_hull = GuiButton(info, "Add Model Hull");
+
+		info.y += 30;
+		if (body->mode != PHYS_MODE_STATIC) {
+			GuiSetState(STATE_DISABLED);
+		}
+
+		bool add_trimesh = GuiButton(info, "Add Model Trimesh");
 		GuiSetState(button_state);
 
 		Model *model = NULL;
-		if (fit_model) {
+		if (fit_model || add_hull || add_trimesh) {
 			Asset *asset = asset_get(ent->mdl.key);
 			if (asset && asset->tag == ASSET_TAG_MODEL &&
 					asset->mdl.meshCount > 0) {
@@ -4529,6 +4594,35 @@ panel_physics_properties(EditorPanelContainer container, bool input) {
 			}
 		}
 
+		u32 point_cnt = 0;
+		u32 idx_cnt = 0;
+
+		if (model && (add_hull || add_trimesh)) {
+			for (int i = 0; i < model->meshCount; ++i) {
+				Mesh *mesh = &model->meshes[i];
+
+				if (!mesh->vertices ||
+						mesh->vertexCount <= 0) {
+					model = NULL;
+					break;
+				}
+
+				point_cnt += (u32)mesh->vertexCount;
+				idx_cnt += (u32)mesh->triangleCount * 3;
+			}
+
+			if (point_cnt < (add_trimesh ? 3u : 4u) ||
+					(add_trimesh && idx_cnt < 3)) {
+				model = NULL;
+			}
+
+			if (!model) {
+				TraceLog(LOG_WARNING,
+					"model has no usable "
+					"collision geometry");
+			}
+		}
+
 		if (add_box || add_sphere || add_capsule || add_cylinder ||
 				model) {
 			edit.focus = 0;
@@ -4584,7 +4678,7 @@ panel_physics_properties(EditorPanelContainer container, bool input) {
 				shape->Cylinder.height = 1.0f;
 			}
 
-			if (model) {
+			if (model && fit_model) {
 				Model local_model = *model;
 				local_model.transform = MatrixIdentity();
 
@@ -4608,6 +4702,22 @@ panel_physics_properties(EditorPanelContainer container, bool input) {
 					shape->rot);
 			}
 
+			if (model && (add_hull || add_trimesh)) {
+				PhysicsShape *shape =
+					&body->shapes[body->shape_cnt];
+
+				shape->tag = add_trimesh
+					? PHYS_SHAPE_STATIC_TRIMESH
+					: PHYS_SHAPE_CONVEX_HULL;
+
+				shape->rot = QuaternionInvert(body->rot);
+				shape->pos = Vector3RotateByQuaternion(
+					Vector3Negate(body->pos), shape->rot);
+
+				physics_shape_model_geometry(
+					shape, model, point_cnt, idx_cnt);
+			}
+
 			body->shape_cnt++;
 
 			action_commit(&action);
@@ -5435,6 +5545,36 @@ gizmo_scale(void) {
 }
 
 static void
+physics_draw_hull(b3ShapeId shape_id, Color colour) {
+	if (!b3Shape_IsValid(shape_id)) {
+		return;
+	}
+
+	const b3HullData *hull = b3Shape_GetHull(shape_id);
+	const b3Vec3 *points = b3GetHullPoints(hull);
+	const b3HullHalfEdge *edges = b3GetHullEdges(hull);
+	b3BodyId body_id = b3Shape_GetBody(shape_id);
+
+	for (int i = 0; i < hull->edgeCount; ++i) {
+		const b3HullHalfEdge *edge = &edges[i];
+
+		/* Each edge has two halves; draw it once. */
+		if (i > edge->twin) {
+			continue;
+		}
+
+		b3Pos a = b3Body_GetWorldPoint(
+			body_id, points[edge->origin]);
+		b3Pos b = b3Body_GetWorldPoint(
+			body_id, points[edges[edge->twin].origin]);
+
+		DrawLine3D(
+			(Vec3){a.x, a.y, a.z},
+			(Vec3){b.x, b.y, b.z}, colour);
+	}
+}
+
+static void
 physics_draw_shapes(u64 id) {
 	Entity *ent = entity_get(id);
 	if (!ent) {
@@ -5496,6 +5636,53 @@ physics_draw_shapes(u64 id) {
 				QuaternionToMatrix(rotation),
 				MatrixTranslate(center.x, center.y, center.z));
 
+			if (shape->tag == PHYS_SHAPE_CONVEX_HULL) {
+				PhysicsBodyRuntime *bodies =
+					ent->phys.runtime.bodies;
+
+				if (bodies && bodies[i].shapes) {
+					physics_draw_hull(bodies[i].shapes[j],
+					                colour);
+				}
+				continue;
+			}
+
+			if (shape->tag == PHYS_SHAPE_STATIC_TRIMESH) {
+				const Vec3 *points = shape->TriMesh.points;
+				const u32 *indices = shape->TriMesh.indices;
+				u32 point_cnt = shape->TriMesh.point_cnt;
+
+				if (!points || !indices) {
+					continue;
+				}
+
+				for (u32 k = 0;
+					k + 2 < shape->TriMesh.idx_cnt;
+					k += 3) {
+					u32 ia = indices[k];
+					u32 ib = indices[k + 1];
+					u32 ic = indices[k + 2];
+
+					if (ia >= point_cnt ||
+							ib >= point_cnt ||
+							ic >= point_cnt) {
+						continue;
+					}
+
+					Vec3 a = Vector3Transform(points[ia],
+					                	world);
+					Vec3 b = Vector3Transform(points[ib],
+					                        world);
+					Vec3 c = Vector3Transform(points[ic],
+					                        world);
+
+					DrawLine3D(a, b, colour);
+					DrawLine3D(b, c, colour);
+					DrawLine3D(c, a, colour);
+				}
+				continue;
+			}
+
 			rlPushMatrix();
 			rlMultMatrixf(MatrixToFloat(transform));
 
diff --git a/ent.c b/ent.c
index 2f61aa7..d8a3a16 100644
--- a/ent.c
+++ b/ent.c
@@ -275,7 +275,9 @@ entity_draw_mdl(u64 id) {
 
 		Vec2 uv_scale = {1, 1};
 		Vec2 uv_offset = {0, 0};
-		cstr shader_key = "default";
+		cstr shader_key = mdl->meshes[i].boneCount > 0
+			? "skinned"
+			: "default";
 
 		if (mat_idx < model->mat_cnt) {
 			const MaterialOverride *override;
@@ -292,7 +294,12 @@ entity_draw_mdl(u64 id) {
 			}
 
 			if (override->shader_key) {
-				shader_key = override->shader_key;
+				if (strcmp(override->shader_key,
+				        	"default") != 0 &&
+					strcmp(shader_key,
+						"skinned") != 0) {
+					shader_key = override->shader_key;
+				}
 			}
 		}
 
@@ -326,18 +333,18 @@ entity_draw_mdl(u64 id) {
 			(u8)((int)colour.a * tint.a / 255),
 		};
 
-		/* Preserve DrawModel's GPU skinning support. */
-		// int loc = SHADER_LOC_MATRIX_BONETRANSFORMS;
-		// if (material.shader.locs != NULL &&
-		// 		material.shader.locs[loc] != -1 &&
-		// 		mdl->boneMatrices != NULL) {
-		// 	rlEnableShader(material.shader.id);
-		// 	rlSetUniformMatrices(
-		// 		material.shader.locs[loc],
-		// 		mdl->boneMatrices,
-		// 		mdl->skeleton.boneCount
-		// 	);
-		// }
+		if (strcmp(shader_key, "skinned") == 0 &&
+				mdl->boneMatrices != NULL) {
+			int loc = fun_shader_uniform(shader_key,
+			                        "boneMatrices");
+
+			rlEnableShader(material.shader.id);
+			rlSetUniformMatrices(
+				loc,
+				mdl->boneMatrices,
+				mdl->skeleton.boneCount
+			);
+		}
 
 		bool nocull =
 			strcmp(shader_key, "alpha_cutoff_nocull") == 0 ||
@@ -607,6 +614,18 @@ entity_physics_clear(PhysicsCmp *phys) {
 			if (b3Body_IsValid(bdy->id)) {
 				b3DestroyBody(bdy->id);
 			}
+
+			if (bdy->meshes) {
+				for (u32 j = 0;
+					j < phys->bodies[i].shape_cnt;
+					++j) {
+					if (bdy->meshes[j]) {
+						b3DestroyMesh(bdy->meshes[j]);
+					}
+				}
+			}
+
+			free(bdy->meshes);
 			free(bdy->shapes);
 		}
 	}
@@ -629,10 +648,12 @@ physics_build_shapes(u64 id, u32 body_index) {
 
 	runtime->shapes = calloc(
 		body->shape_cnt, sizeof(*runtime->shapes));
+	runtime->meshes = calloc(
+		body->shape_cnt, sizeof(*runtime->meshes));
 
-	if (!runtime->shapes) {
-		perror("physics shape handles allocation failed");
-		exit(EXIT_FAILURE);
+	if (!runtime->shapes || !runtime->meshes) {
+		perror("physics shape allocation failed");
+		exit(1);
 	}
 
 	Matrix entity_world = entity_world_matrix(id);
@@ -826,6 +847,135 @@ physics_build_shapes(u64 id, u32 body_index) {
 			break;
 		}
 
+		case PHYS_SHAPE_CONVEX_HULL:
+		case PHYS_SHAPE_STATIC_TRIMESH: {
+			bool trimesh = shape->tag == PHYS_SHAPE_STATIC_TRIMESH;
+			if (trimesh && body->mode != PHYS_MODE_STATIC) {
+				TraceLog(LOG_WARNING,
+					"trimesh requires a static body");
+				break;
+			}
+
+			Vec3 *source = trimesh
+				? shape->TriMesh.points
+				: shape->ConvexHull.points;
+
+			u32 point_cnt = trimesh
+				? shape->TriMesh.point_cnt
+				: shape->ConvexHull.point_cnt;
+
+			if (!source || point_cnt < (trimesh ? 3u : 4u) ||
+					point_cnt > INT32_MAX) {
+				break;
+			}
+
+			b3Vec3 *points = malloc(point_cnt * sizeof(*points));
+			if (!points) {
+				perror("physics points allocation failed");
+				exit(EXIT_FAILURE);
+			}
+
+			/* Bake the full transform into body-local geometry. */
+			for (u32 k = 0; k < point_cnt; ++k) {
+				Vec3 point =
+					Vector3Transform(source[k], world);
+				point = Vector3RotateByQuaternion(
+						Vector3Subtract(point, pos),
+							inverse_rot);
+
+				points[k] = (b3Vec3){
+					point.x, point.y, point.z,
+				};
+			}
+
+			if (!trimesh) {
+				b3HullData *hull =
+					b3CreateHull(
+						points,
+						(int)point_cnt,
+						(int)point_cnt);
+
+				if (hull) {
+					runtime->shapes[j] =
+						b3CreateTransformedHullShape(
+							runtime->id,
+							&def,
+							hull,
+							b3Transform_identity,
+							(b3Vec3){1, 1, 1});
+
+					b3DestroyHull(hull);
+				} else {
+					TraceLog(LOG_WARNING,
+						"convex hull creation failed");
+				}
+
+				free(points);
+				break;
+			}
+
+			u32 idx_cnt = shape->TriMesh.idx_cnt;
+			if (!shape->TriMesh.indices ||
+					idx_cnt < 3 || idx_cnt % 3 != 0 ||
+					idx_cnt > INT32_MAX) {
+				free(points);
+				break;
+			}
+
+			int32_t *indices = malloc(idx_cnt * sizeof(*indices));
+			if (!indices) {
+				perror("physics indices allocation failed");
+				exit(EXIT_FAILURE);
+			}
+
+			u32 k = 0;
+			for (; k < idx_cnt; ++k) {
+				u32 index = shape->TriMesh.indices[k];
+				if (index >= point_cnt) {
+					break;
+				}
+				indices[k] = (int32_t)index;
+			}
+
+			if (k != idx_cnt) {
+				TraceLog(LOG_WARNING,
+					"triangle mesh index out of range");
+				free(indices);
+				free(points);
+				break;
+			}
+
+			b3MeshDef mesh_def = {0};
+			mesh_def.vertices = points;
+			mesh_def.vertexCount = (int)point_cnt;
+			mesh_def.indices = indices;
+			mesh_def.triangleCount = (int)(idx_cnt / 3);
+			mesh_def.identifyEdges = true;
+
+			/* Preserve outward winding when the transform mirrors geometry. */
+			mesh_def.clockWiseWinding = Vector3DotProduct(
+				Vector3CrossProduct(
+					(Vec3){world.m0, world.m1, world.m2},
+					(Vec3){world.m4, world.m5, world.m6}),
+				(Vec3){world.m8, world.m9, world.m10}) < 0;
+
+			b3MeshData *mesh = b3CreateMesh(&mesh_def, NULL, 0);
+
+			free(indices);
+			free(points);
+
+			if (!mesh) {
+				TraceLog(LOG_WARNING,
+					"triangle mesh creation failed");
+				break;
+			}
+
+			runtime->meshes[j] = mesh;
+			runtime->shapes[j] = b3CreateMeshShape(
+				runtime->id, &def, mesh, (b3Vec3){1, 1, 1});
+			break;
+		}
+
 		default:
 			break;
 		}
diff --git a/env.c b/env.c
index 31c7971..efcdfc2 100644
--- a/env.c
+++ b/env.c
@@ -267,6 +267,7 @@ void
 env_update(void) {
 	sky_update_lighting();
         env_update_shader("default");
+        env_update_shader("skinned");
         env_update_shader("alpha_cutoff");
         env_update_shader("alpha_cutoff_nocull");
         env_update_shader("foliage");
diff --git a/physics.h b/physics.h
index 5a9a8d0..3fde638 100644
--- a/physics.h
+++ b/physics.h
@@ -141,6 +141,7 @@ typedef struct {
 	u64 entity_id;
 	b3BodyId id;
 	b3ShapeId *shapes; // count is stored in PhysicsCmp
+	b3MeshData **meshes; // same count, null for non mesh types
 } PhysicsBodyRuntime;
 
 typedef struct {
diff --git a/res.c b/res.c
index f4c8597..db74376 100644
--- a/res.c
+++ b/res.c
@@ -37,8 +37,29 @@ asset_load_data(cstr key) {
 			return false;
 		}
 
+		bool skinned = mdl.skeleton.boneCount > 0 &&
+			mdl.skeleton.bindPose != NULL;
+
+		cstr sdr_key = skinned ? "skinned" : "default";
+
 		for (int i = 0; i < mdl.materialCount; ++i) {
-			mdl.materials[i].shader = shader_get("default")->sdr;
+			mdl.materials[i].shader = shader_get(sdr_key)->sdr;
+		}
+
+		if (skinned) {
+			int anim_count = 0;
+			ModelAnimation *anims =
+				LoadModelAnimations(key, &anim_count);
+
+			if (anim_count > 0) {
+				UpdateModelAnimation(mdl, anims[0], 0.0f);
+			}
+
+			UnloadModelAnimations(anims, anim_count);
+		}
+
+		for (int i = 0; i < mdl.materialCount; ++i) {
+			mdl.materials[i].shader = shader_get(sdr_key)->sdr;
 		}
 
 		asset->tag = ASSET_TAG_MODEL;
@@ -148,6 +169,10 @@ res_init(void) {
 	                "res/sdr/mdl_vtx_lit.vs",
 	        	"res/sdr/mdl_vtx_lit.fs");
 
+	fun_shader_create("skinned",
+	                "res/sdr/mdl_skinned_vtx_lit.vs",
+	        	"res/sdr/mdl_vtx_lit.fs");
+
 	fun_shader_create("alpha_cutoff",
 			"res/sdr/mdl_vtx_lit.vs",
 			"res/sdr/mdl_vtx_lit_cutoff.fs");
diff --git a/res/mdl/psx-characters/male/rigged/male1.glb b/res/mdl/psx-characters/male/rigged/male1.glb
new file mode 100644
index 0000000..69272c1
--- /dev/null
+++ b/res/mdl/psx-characters/male/rigged/male1.glb
diff --git a/res/mdl/psx-characters/male/rigged/male1.raylib.glb b/res/mdl/psx-characters/male/rigged/male1.raylib.glb
new file mode 100644
index 0000000..283a3d2
--- /dev/null
+++ b/res/mdl/psx-characters/male/rigged/male1.raylib.glb
diff --git a/res/mdl/psx-trees/dead_tree_rt_1.glb b/res/mdl/psx-trees/dead_tree_rt_1.glb
new file mode 100644
index 0000000..fec0486
--- /dev/null
+++ b/res/mdl/psx-trees/dead_tree_rt_1.glb
diff --git a/res/mdl/psx-trees/dead_tree_rt_2.glb b/res/mdl/psx-trees/dead_tree_rt_2.glb
new file mode 100644
index 0000000..0523544
--- /dev/null
+++ b/res/mdl/psx-trees/dead_tree_rt_2.glb
diff --git a/res/mdl/psx-trees/small_tree_rt_1.glb b/res/mdl/psx-trees/small_tree_rt_1.glb
new file mode 100644
index 0000000..632de9d
--- /dev/null
+++ b/res/mdl/psx-trees/small_tree_rt_1.glb
diff --git a/res/mdl/psx-trees/tree_rt_1.glb b/res/mdl/psx-trees/tree_rt_1.glb
new file mode 100644
index 0000000..0c7fa93
--- /dev/null
+++ b/res/mdl/psx-trees/tree_rt_1.glb
diff --git a/res/mdl/psx-trees/tree_rt_2.glb b/res/mdl/psx-trees/tree_rt_2.glb
new file mode 100644
index 0000000..881f7d8
--- /dev/null
+++ b/res/mdl/psx-trees/tree_rt_2.glb
diff --git a/res/mdl/psx-trees/tree_rt_2_1.glb b/res/mdl/psx-trees/tree_rt_2_1.glb
new file mode 100644
index 0000000..8c9669c
--- /dev/null
+++ b/res/mdl/psx-trees/tree_rt_2_1.glb
diff --git a/res/mdl/psx-trees/tree_rt_3.glb b/res/mdl/psx-trees/tree_rt_3.glb
new file mode 100644
index 0000000..2ec3314
--- /dev/null
+++ b/res/mdl/psx-trees/tree_rt_3.glb
diff --git a/res/mdl/psx-trees/tree_rt_4.glb b/res/mdl/psx-trees/tree_rt_4.glb
new file mode 100644
index 0000000..19963e1
--- /dev/null
+++ b/res/mdl/psx-trees/tree_rt_4.glb
diff --git a/res/save/scene.fgs b/res/save/scene.fgs
index ae27721..b07fae4 100644
--- a/res/save/scene.fgs
+++ b/res/save/scene.fgs
diff --git a/res/sdr/mdl_foliage.vs b/res/sdr/mdl_foliage.vs
index 1198009..366290a 100644
--- a/res/sdr/mdl_foliage.vs
+++ b/res/sdr/mdl_foliage.vs
@@ -27,20 +27,21 @@ out vec4 frag_colour;
 out vec3 frag_lighting;
 
 void main() {
-	vec3 world_normal = normalize((matNormal * vec4(vertexNormal, 0.0)).xyz);
+	vec3 canopy_center = vec3(0.0, 4.0, 0.0);
+	vec3 canopy_normal = vertexNormal;
+	vec3 offset = vertexPosition - canopy_center;
 
-	// float sun_diffuse = abs(dot(world_normal, sun_direction));
-	// float moon_diffuse = abs(dot(world_normal, moon_direction));
+	if (dot(offset, offset) > 0.0001) {
+		canopy_normal = normalize(offset);
+	}
 
-	// for stronger shading, use 0.3 + 0.7 * abs(...)
-	// float sun_diffuse = 0.5 + 0.5 * abs(dot(world_normal, sun_direction));
-	// float moon_diffuse = 0.5 + 0.5 * abs(dot(world_normal, moon_direction));
-	float sun_diffuse = abs(dot(world_normal, sun_direction));
-	float moon_diffuse = abs(dot(world_normal, moon_direction));
+	vec3 world_normal = normalize((matNormal * vec4(canopy_normal, 0.0)).xyz);
 
-	// hack to fix lighting at midday
-	float midday = smoothstep(0.7, 1.0, sun_direction.y);
-	sun_diffuse = mix(sun_diffuse, 0.65, midday);
+	float sun_facing = dot(world_normal, sun_direction);
+	float moon_facing = dot(world_normal, moon_direction);
+
+	float sun_diffuse = max(sun_facing, 0.0) + 0.1 * max(-sun_facing, 0.0);
+	float moon_diffuse = max(moon_facing, 0.0) + 0.1 * max(-moon_facing, 0.0);
 
 	vec3 ambient_light = ambient_colour * ambient_intensity;
 	vec3 sun_light = sun_colour * sun_intensity * sun_diffuse;
diff --git a/res/sdr/mdl_skinned_vtx_lit.vs b/res/sdr/mdl_skinned_vtx_lit.vs
new file mode 100644
index 0000000..a6da15e
--- /dev/null
+++ b/res/sdr/mdl_skinned_vtx_lit.vs
@@ -0,0 +1,59 @@
+#version 330
+
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+uniform mat4 mvp;
+uniform mat4 matNormal;
+
+uniform vec3 sun_direction;
+uniform vec3 sun_colour;
+uniform float sun_intensity;
+
+uniform vec3 moon_direction;
+uniform vec3 moon_colour;
+uniform float moon_intensity;
+
+uniform vec3 ambient_colour;
+uniform float ambient_intensity;
+
+uniform vec2 uv_tiling;
+uniform vec2 uv_offset;
+
+out vec2 frag_texcoord;
+out vec4 frag_colour;
+out vec3 frag_lighting;
+out vec3 frag_normal;
+
+in vec4 vertexBoneIndices;
+in vec4 vertexBoneWeights;
+
+uniform mat4 boneMatrices[64];
+
+void main() {
+	mat4 skin =
+		vertexBoneWeights.x * boneMatrices[int(vertexBoneIndices.x)] +
+		vertexBoneWeights.y * boneMatrices[int(vertexBoneIndices.y)] +
+		vertexBoneWeights.z * boneMatrices[int(vertexBoneIndices.z)] +
+		vertexBoneWeights.w * boneMatrices[int(vertexBoneIndices.w)];
+
+	vec4 position = skin * vec4(vertexPosition, 1.0);
+	vec3 normal = (skin * vec4(vertexNormal, 0.0)).xyz;
+	vec3 world_normal = normalize((matNormal * vec4(normal, 0.0)).xyz);
+
+	float sun_diffuse = max(dot(world_normal, sun_direction), 0.0);
+	float moon_diffuse = max(dot(world_normal, moon_direction), 0.0);
+
+	vec3 ambient_light = ambient_colour * ambient_intensity;
+	vec3 sun_light = sun_colour * sun_intensity * sun_diffuse;
+	vec3 moon_light = moon_colour * moon_intensity * moon_diffuse;
+
+	frag_lighting = ambient_light + sun_light + moon_light;
+	frag_texcoord = vertexTexCoord * uv_tiling + uv_offset;
+	frag_colour = vertexColor;
+	frag_normal = world_normal;
+
+	gl_Position = mvp * position;
+}