GetRayBoxCells.

2 files changed, 220 insertions, 3 deletions

diff --git a/examples/ray_box_cells/main.lua b/examples/ray_box_cells/main.lua
new file mode 100644
index 0000000..9c7e54f
--- /dev/null
+++ b/examples/ray_box_cells/main.lua
@@ -0,0 +1,116 @@
+package.path = package.path..";"..RL.GetBasePath().."../resources/lib/?.lua"
+
+Util = require( "utillib" )
+Vector2 = require( "vector2" )
+Vector3 = require( "vector3" )
+Rectangle = require( "rectangle" )
+BoundinBox = require( "bounding_box" )
+Cam3D = require( "camera3d" )
+
+local monitor = 0
+local camera = {}
+
+local box = BoundinBox:new( { -8, 0, -8 }, { 16, 16, 16 } )
+local cellSize = Vector3:new( 1, 1, 1 )
+local drawCellSize = cellSize:clone()
+local ray = nil
+local rayCol = nil
+local cells = {}
+
+local guiMouseHover = false
+local spinnerEdit = {
+	x = false,
+	y = false,
+	z = false
+}
+
+function RL.init()
+	local mPos = Vector2:newT( RL.GetMonitorPosition( monitor ) )
+	local mSize = Vector2:newT( RL.GetMonitorSize( monitor ) )
+	local winSize = Vector2:new( 1028, 720 )
+
+	RL.SetWindowTitle( "Ray box cells" )
+	RL.SetWindowState( RL.FLAG_WINDOW_RESIZABLE )
+	RL.SetWindowState( RL.FLAG_VSYNC_HINT )
+	RL.SetWindowSize( winSize )
+	RL.SetWindowPosition( { mPos.x + mSize.x / 2 - winSize.x / 2, mPos.y + mSize.y / 2 - winSize.y / 2 } )
+	RL.SetTextLineSpacing( 26 )
+
+	camera = Cam3D:new()
+
+	camera:setPosition( { 0, 8, 16 } )
+	camera:setTarget( { 0, 0, 0 } )
+	camera:setUp( { 0, 1, 0 } )
+	camera.mode = camera.MODES.FREE
+
+	RL.GuiSetStyle( RL.DEFAULT, RL.TEXT_SIZE, 24 )
+end
+
+function RL.update( delta )
+	camera:update( delta )
+
+	if RL.IsKeyPressed( RL.KEY_SPACE ) then
+		if camera.mode == camera.MODES.FREE then
+			camera.mode = camera.MODES.FIRST_PERSON
+		else
+			camera.mode = camera.MODES.FREE
+		end
+	end
+
+	-- Raycast.
+
+	-- if not guiMouseHover then
+	if not guiMouseHover and RL.IsMouseButtonPressed( RL.MOUSE_BUTTON_LEFT ) then
+		ray = RL.GetMouseRay( RL.GetMousePosition(), camera.camera )
+		rayCol = box:getRayCollision( ray )
+
+		cells = RL.GetRayBoxCells( ray, box:maxToPos(), cellSize )
+		drawCellSize:setV( cellSize )
+	end
+end
+
+local function drawSpinner( axis, pos )
+	local result = 0
+	local bounds = Rectangle:temp( pos.x, pos.y, 96, 24 )
+
+	result, cellSize[ axis ] = RL.GuiSpinner( bounds, axis, cellSize[ axis ], 1, box.max[ axis ], spinnerEdit[ axis ] )
+
+	if result == 1 then
+		spinnerEdit[ axis ] = not spinnerEdit[ axis ]
+	end
+
+	if bounds:checkCollisionPoint( RL.GetMousePosition() ) then
+		guiMouseHover = true
+	end
+end
+
+function RL.draw()
+	RL.ClearBackground( RL.LIGHTGRAY )
+
+	camera:beginMode3D()
+		RL.DrawGrid( 16, 1 )
+		RL.DrawCubeWires( box.min + box.max:scale( 0.5 ), box.max, RL.WHITE )
+
+		if ray then
+			RL.DrawRay( ray, RL.BLUE )
+			RL.DrawSphere( ray[1], 0.1, RL.GREEN )
+		end
+
+		if rayCol and rayCol.hit then
+			RL.DrawSphere( rayCol.point, 0.1, RL.RED )
+		end
+
+		if cells then
+			for _, cell in ipairs( cells ) do
+				RL.DrawCubeWires( box.min + Vector3:tempT( cell ) * drawCellSize + drawCellSize:scale( 0.5 ), drawCellSize, RL.RED )
+				RL.DrawCube( box.min + Vector3:tempT( cell ) * drawCellSize + drawCellSize:scale( 0.5 ), drawCellSize, { 150, 200, 150, 150 } )
+			end
+		end
+	camera:endMode3D()
+
+	guiMouseHover = false
+
+	drawSpinner( "x", Vector2:temp( 16, 2 ) )
+	drawSpinner( "y", Vector2:temp( 16, 22 ) )
+	drawSpinner( "z", Vector2:temp( 16, 44 ) )
+end
diff --git a/examples/resources/lib/boundingBox.lua b/examples/resources/lib/bounding_box.lua
index cc29fab..3cf6787 100644
--- a/examples/resources/lib/boundingBox.lua
+++ b/examples/resources/lib/bounding_box.lua
@@ -3,7 +3,7 @@ if table.unpack == nil then
 	table.unpack = unpack
 end
 
-local Vector3 = Vector3 or require( "vector3" )
+local Vector3 = require( "vector3" )
 
 local BoundingBox = {}
 local metatable = {
@@ -12,6 +12,30 @@ local metatable = {
 		return "{{"..tostring( b.min.x )..", "..tostring( b.min.y )..", "..tostring( b.min.z ).."}, {"
 		..tostring( b.max.x )..", "..tostring( b.max.y )..", "..tostring( b.max.z ).."}}"
 	end,
+	-- __add = function( v1, v2 )
+	-- 	return Vector2:new( v1.x + v2.x, v1.y + v2.y )
+	-- end,
+	-- __sub = function( v1, v2 )
+	-- 	return Vector2:new( v1.x - v2.x, v1.y - v2.y )
+	-- end,
+	-- __mul = function( v1, v2 )
+	-- 	return Vector2:new( v1.x * v2.x, v1.y * v2.y )
+	-- end,
+	-- __div = function( v1, v2 )
+	-- 	return Vector2:new( v1.x / v2.x, v1.y / v2.y )
+	-- end,
+	-- __mod = function( v, value )
+	-- 	return Vector2:new( math.fmod( v.x, value ), math.fmod( v.y, value ) )
+	-- end,
+	-- __pow = function( v, value )
+	-- 	return Vector2:new( v.x ^ value, v.y ^ value )
+	-- end,
+	-- __unm = function( v )
+	-- 	return Vector2:new( -v.x, -v.y )
+	-- end,
+	__eq = function( b1, b2 )
+		return b1.min == b2.min and b1.max == b2.max
+	end,
 }
 
 --- Expects format { ... }, { ... }
@@ -111,26 +135,103 @@ function BoundingBox:getPoints()
 	}
 end
 
+-- Assumes max is used as size.
 function BoundingBox:checkCollisionBox( b )
 	return RL.CheckCollisionBoxes( self:maxToPos(), b:maxToPos() )
 end
 
+-- Assumes max is used as size.
 function BoundingBox:checkCollisionSphere( center, radius )
 	return RL.CheckCollisionBoxSphere( self:maxToPos(), center, radius )
 end
 
+-- Assumes max is used as size.
+function BoundingBox:checkCollisionPoint( point )
+	local max = self.min + self.max
+
+	return self.min.x <= point.x
+	and self.min.y <= point.y
+	and self.min.z <= point.z
+	and point.x <= max.x
+	and point.y <= max.y
+	and point.z <= max.z
+end
+
+-- Assumes max is used as size.
 function BoundingBox:getRayCollision( ray )
 	return RL.GetRayCollisionBox( ray, self:maxToPos() )
 end
 
 -- Max to position from size.
 function BoundingBox:maxToPos()
-	return BoundingBox:new( self.min, self.min + self.max )
+	return BoundingBox:newV( self.min, self.min + self.max )
 end
 
 -- Max to size from position.
 function BoundingBox:maxToSize()
-	return BoundingBox:new( self.min, self.max - self.min )
+	return BoundingBox:newV( self.min, self.max - self.min )
+end
+
+-- Temp pre generated objects to avoid "slow" table generation.
+
+local TEMP_COUNT = 100
+local tempPool = {}
+local curTemp = 1
+
+for _ = 1, TEMP_COUNT do
+	table.insert( tempPool, BoundingBox:new( { 0, 0, 0 }, { 0, 0, 0 } ) )
+end
+
+--- Expects format { ... }, { ... }
+function BoundingBox:temp( min, max )
+	local object = tempPool[ curTemp ]
+
+	curTemp = curTemp < TEMP_COUNT and curTemp + 1 or 1
+
+	object.min = Vector3:tempT( min )
+	object.max = Vector3:tempT( max )
+
+	return object
+end
+
+--- Expects format { { ... }, { ... } }
+function BoundingBox:tempT( t )
+	local object = tempPool[ curTemp ]
+
+	curTemp = curTemp < TEMP_COUNT and curTemp + 1 or 1
+
+	object.min = Vector3:tempT( t[1] )
+	object.max = Vector3:tempT( t[2] )
+
+	return object
+end
+
+--- Expects format { Vector3, Vector3 }
+function BoundingBox:tempV( min, max )
+	local object = tempPool[ curTemp ]
+
+	curTemp = curTemp < TEMP_COUNT and curTemp + 1 or 1
+
+	object.min = Vector3:tempV( min )
+	object.max = Vector3:tempV( max )
+
+	return object
+end
+
+--- Expects format BoundingBox
+function BoundingBox:tempB( b )
+	local object = tempPool[ curTemp ]
+
+	curTemp = curTemp < TEMP_COUNT and curTemp + 1 or 1
+
+	object.min = Vector3:tempV( b.min )
+	object.max = Vector3:tempV( b.max )
+
+	return object
+end
+
+function BoundingBox:getTempId()
+	return curTemp
 end
 
 return BoundingBox