1 files changed, 166 insertions, 0 deletions
diff --git a/examples/resources/lib/camera3d.lua b/examples/resources/lib/camera3d.lua
new file mode 100644
index 0000000..1e51844
--- /dev/null
+++ b/examples/resources/lib/camera3d.lua
@@ -0,0 +1,166 @@
+Util = require( "utillib" )
+Vec2 = require( "vector2" )
+Vec3 = require( "vector3" )
+
+Camera3D = {}
+Camera3D.meta = {
+	__index = Camera3D,
+}
+Camera3D.MODES = {
+	CUSTOM = 0,
+	FREE = 1,
+	FIRST_PERSON = 2,
+	ORBITAL = 3,
+}
+Camera3D.KEYS = {
+	FORWARD = RL.KEY_W,
+	BACKWARD = RL.KEY_S,
+	RIGHT = RL.KEY_D,
+	LEFT = RL.KEY_A,
+	PAN = RL.KEY_LEFT_SHIFT,
+	FAST = RL.KEY_LEFT_SHIFT,
+}
+Camera3D.MOUSE_MOVE_SPEED = 0.5
+Camera3D.KEYBOARD_MOVE_SPEED = 10
+Camera3D.KEYBOARD_MOVE_SPEED_MULTI = 3
+Camera3D.TURN_SPEED = 0.15
+Camera3D.ORBITAL_SPEED = 0.5
+Camera3D.ZOOM_AMOUNT = 0.1
+
+function Camera3D:new()
+	local object = setmetatable( {}, Camera3D.meta )
+
+	object.camera = RL.CreateCamera3D()
+	object.mode = object.MODES.CUSTOM
+
+	return object
+end
+
+function Camera3D:setPosition( pos )
+	RL.SetCamera3DPosition( self.camera, pos )
+end
+
+function Camera3D:setTarget( target )
+	RL.SetCamera3DTarget( self.camera, target )
+end
+
+function Camera3D:setUp( up )
+	RL.SetCamera3DUp( self.camera, up )
+end
+
+function Camera3D:setFoyv( foyv )
+	RL.SetCamera3DFovy( self.camera, foyv )
+end
+
+function Camera3D:setProjection( projection )
+	RL.SetCamera3DProjection( self.camera, projection )
+end
+
+function Camera3D:getPosition()
+	return Vec3:new( RL.GetCamera3DPosition( self.camera ) )
+end
+
+function Camera3D:getTarget()
+	return Vec3:new( RL.GetCamera3DTarget( self.camera ) )
+end
+
+function Camera3D:getUp()
+	return Vec3:new( RL.GetCamera3DUp( self.camera ) )
+end
+
+function Camera3D:getFoyv()
+	return  RL.GetCamera3DFovy( self.camera )
+end
+
+function Camera3D:getProjection()
+	return RL.GetCamera3DProjection( self.camera )
+end
+
+--- Returns the cameras forward vector ( normalized )
+function Camera3D:getForward()
+	return Vec3:new( RL.GetCamera3DForward( self.camera ) )
+end
+
+--- Returns the cameras up vector ( normalized ) Note: The up vector might not be perpendicular to the forward vector
+function Camera3D:getUpward()
+	return Vec3:new( RL.GetCamera3DUpNormalized( self.camera ) )
+end
+
+function Camera3D:process( delta )
+	if self.mode == self.MODES.FREE then
+		if RL.IsMouseButtonDown( RL.MOUSE_BUTTON_MIDDLE ) then
+			local mouseDelta = Vec2:new( RL.GetMouseDelta() )
+
+			if RL.IsKeyDown( self.KEYS.PAN ) then
+				mouseDelta = mouseDelta:scale( self.MOUSE_MOVE_SPEED * delta )
+				local forward = RL.GetCamera3DForward( self.camera )[2]
+
+				RL.Camera3DMoveRight( self.camera, -mouseDelta.x, true )
+				RL.Camera3DMoveUp( self.camera, mouseDelta.y * -( ( 1 - math.abs( forward ) ) * Util.sign( forward ) ) )
+				RL.Camera3DMoveForward( self.camera, mouseDelta.y * math.abs( forward ), true )
+			else
+				mouseDelta = mouseDelta:scale( self.TURN_SPEED * delta )
+
+				RL.Camera3DYaw( self.camera, -mouseDelta.x, true )
+				RL.Camera3DPitch( self.camera, -mouseDelta.y, false, true, false )
+			end
+		end
+
+		local mouseScroll = RL.GetMouseWheelMove()
+
+		if mouseScroll ~= 0 then
+			RL.Camera3DMoveToTarget( self.camera, self.ZOOM_AMOUNT * self:getTargetDistance() * -mouseScroll )
+		end
+	elseif self.mode == self.MODES.FIRST_PERSON then
+		local mouseDelta = Vec2:new( RL.GetMouseDelta() )
+
+		mouseDelta = mouseDelta:scale( self.TURN_SPEED * delta )
+
+		RL.Camera3DYaw( self.camera, -mouseDelta.x, false )
+		RL.Camera3DPitch( self.camera, -mouseDelta.y, false, false, false )
+		RL.SetMousePosition( Vec2:new( RL.GetScreenSize() ):scale( 0.5 ) )
+
+		local distance = self.KEYBOARD_MOVE_SPEED * delta
+
+		if RL.IsKeyDown( self.KEYS.FAST ) then
+			distance = distance * self.KEYBOARD_MOVE_SPEED_MULTI
+		end
+
+		if RL.IsKeyDown( self.KEYS.FORWARD ) then
+			RL.Camera3DMoveForward( self.camera, distance, false )
+		elseif RL.IsKeyDown( self.KEYS.BACKWARD ) then
+			RL.Camera3DMoveForward( self.camera, -distance, false )
+		end
+
+		if RL.IsKeyDown( self.KEYS.RIGHT ) then
+			RL.Camera3DMoveRight( self.camera, distance, false )
+		elseif RL.IsKeyDown( self.KEYS.LEFT ) then
+			RL.Camera3DMoveRight( self.camera, -distance, false )
+		end
+	elseif self.mode == self.MODES.ORBITAL then
+		RL.Camera3DYaw( self.camera, self.ORBITAL_SPEED * delta, true )
+	end
+end
+
+--- Draw camera target.
+function Camera3D:draw()
+	local targetPos = self:getTarget()
+
+	RL.DrawLine3D( targetPos + Vec3:new( -0.5, 0, 0 ), targetPos + Vec3:new( 0.5, 0, 0 ), RL.GREEN )
+	RL.DrawLine3D( targetPos + Vec3:new( 0, -0.5, 0 ), targetPos + Vec3:new( 0, 0.5, 0 ), RL.BLUE )
+	RL.DrawLine3D( targetPos + Vec3:new( 0, 0, -0.5 ), targetPos + Vec3:new( 0, 0, 0.5 ), RL.RED )
+end
+
+function Camera3D:getTargetDistance()
+	return RL.Vector3Distance( self:getPosition(), self:getTarget() )
+end
+
+function Camera3D:beginMode3D()
+	RL.BeginMode3D( self.camera )
+end
+
+function Camera3D:endMode3D()
+	RL.EndMode3D()
+end
+
+return Camera3D