implement basic floating-ray character controller

1 files changed, 35 insertions, 0 deletions

diff --git a/honey/ecs/collision.lua b/honey/ecs/collision.lua
index 5c0452b..4c8af5b 100644
--- a/honey/ecs/collision.lua
+++ b/honey/ecs/collision.lua
@@ -25,8 +25,12 @@ local function createGeom(self, id, collision)
 		local d = normal:dot(position)
 		print(normal, d)
 		geom = ode.CreatePlane(self.space, normal[1], normal[2], normal[3], d)
+	elseif collision.class == "ray" then
+		geom = ode.CreateRay(self.space, collision.length)
 	end
 
+	ode.GeomSetCategoryBits(geom, collision.category or 1)
+	ode.GeomSetCollideBits(geom, collision.collide or 0xffffffff)
 	ode.GeomSetData(geom, id)
 	
 	collision._geom = geom
@@ -36,6 +40,15 @@ local function createGeom(self, id, collision)
 	end)
 end
 
+
+local function isPlaceable(collision)
+	if collision.class == "ray" then
+		return true
+	end
+	return false
+end
+
+
 system = function(params)
 	local db = params.db
 	local space = params.space
@@ -50,6 +63,28 @@ system = function(params)
 					createGeom(self, id, collision)
 					print(id, collision._geom)
 				end
+				if 
+					not self.db:getComponent(id, "physics") and 
+					isPlaceable(collision) 
+				then
+					-- no attached physics body, update position & orientation 
+					-- from node transform
+					local node = self.db:getComponent(id, "node")
+					local m = node._matrix or node.matrix
+					local geom = collision._geom
+					ode.GeomSetPosition(
+						geom,
+						m[1][4],
+						m[2][4],
+						m[3][4]
+					)
+					ode.GeomSetRotation(
+						geom,
+						m[1][1], m[1][2], m[1][3],
+						m[2][1], m[2][2], m[2][3],
+						m[3][1], m[3][2], m[3][3]
+					)
+				end
 			end
 		end
 	}