Add Interaction/Index_Hands example

examples/Interaction/Index_Hands/knuckles.lua

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+-- Valve Knuckles Skeleton Indices
+Root = 1
+Wrist = 2
+Thumb0 = 3
+Thumb1 = 4
+Thumb2 = 5
+Thumb3 = 6
+IndexFinger0 = 7
+IndexFinger1 = 8
+IndexFinger2 = 9
+IndexFinger3 = 10
+IndexFinger4 = 11
+MiddleFinger0 = 12
+MiddleFinger1 = 13
+MiddleFinger2 = 14
+MiddleFinger3 = 15
+MiddleFinger4 = 16
+RingFinger0 = 17
+RingFinger1 = 18
+RingFinger2 = 19
+RingFinger3 = 20
+RingFinger4 = 21
+PinkyFinger0 = 22
+PinkyFinger1 = 23
+PinkyFinger2 = 24
+PinkyFinger3 = 25
+PinkyFinger4 = 26
+Aux_Thumb = 27
+Aux_IndexFinger = 28
+Aux_MiddleFinger = 29
+Aux_RingFinger = 30
+Aux_PinkyFinger = 31
+Count = 32
+
+local knuckles = {}
+
+-- node to right Knuckles Skeleton
+knuckles.right_to_index = {
+  finger_thumb_r_end=Thumb3,
+  finger_thumb_2_r=Thumb2,
+  finger_thumb_1_r=Thumb1,
+  finger_thumb_0_r=Thumb0,
+
+  finger_index_r_end=IndexFinger4,
+  finger_index_2_r=IndexFinger3,
+  finger_index_1_r=IndexFinger2,
+  finger_index_0_r=IndexFinger1,
+  finger_index_meta_r=IndexFinger0,
+
+  finger_middle_r_end=MiddleFinger4,
+  finger_middle_2_r=MiddleFinger3,
+  finger_middle_1_r=MiddleFinger2,
+  finger_middle_0_r=MiddleFinger1,
+  finger_middle_meta_r=MiddleFinger0,
+
+  finger_ring_r_end=RingFinger4,
+  finger_ring_2_r=RingFinger3,
+  finger_ring_1_r=RingFinger2,
+  finger_ring_0_r=RingFinger1,
+  finger_ring_meta_r=RingFinger0,
+
+  finger_pinky_r_end=PinkyFinger4,
+  finger_pinky_2_r=PinkyFinger3,
+  finger_pinky_1_r=PinkyFinger2,
+  finger_pinky_0_r=PinkyFinger1,
+  finger_pinky_meta_r=PinkyFinger0,
+
+  wrist_r=Wrist,
+
+  finger_index_r_aux=Aux_IndexFinger,
+  finger_middle_r_aux=Aux_MiddleFinger,
+  finger_pinky_r_aux=Aux_PinkyFinger,
+  finger_ring_r_aux=Aux_RingFinger,
+  finger_thumb_r_aux=Aux_Thumb,
+
+  Root=Root
+}
+
+-- node to left Knuckles Skeleton
+knuckles.left_to_index = {
+  finger_thumb_l_end=Thumb3,
+  finger_thumb_2_l=Thumb2,
+  finger_thumb_1_l=Thumb1,
+  finger_thumb_0_l=Thumb0,
+
+  finger_index_l_end=IndexFinger4,
+  finger_index_2_l=IndexFinger3,
+  finger_index_1_l=IndexFinger2,
+  finger_index_0_l=IndexFinger1,
+  finger_index_meta_l=IndexFinger0,
+
+  finger_middle_l_end=MiddleFinger4,
+  finger_middle_2_l=MiddleFinger3,
+  finger_middle_1_l=MiddleFinger2,
+  finger_middle_0_l=MiddleFinger1,
+  finger_middle_meta_l=MiddleFinger0,
+
+  finger_ring_l_end=RingFinger4,
+  finger_ring_2_l=RingFinger3,
+  finger_ring_1_l=RingFinger2,
+  finger_ring_0_l=RingFinger1,
+  finger_ring_meta_l=RingFinger0,
+
+  finger_pinky_l_end=PinkyFinger4,
+  finger_pinky_2_l=PinkyFinger3,
+  finger_pinky_1_l=PinkyFinger2,
+  finger_pinky_0_l=PinkyFinger1,
+  finger_pinky_meta_l=PinkyFinger0,
+
+  wrist_l=Wrist,
+
+  finger_index_l_aux=Aux_IndexFinger,
+  finger_middle_l_aux=Aux_MiddleFinger,
+  finger_pinky_l_aux=Aux_PinkyFinger,
+  finger_ring_l_aux=Aux_RingFinger,
+  finger_thumb_l_aux=Aux_Thumb,
+
+  Root=Root
+}
+
+knuckles.hand_to_index = {
+  right=knuckles.right_to_index,
+  left=knuckles.left_to_index
+}
+
+return knuckles

examples/Interaction/Index_Hands/main.lua

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+-- load constants from file
+local knuckles = require 'knuckles'
+
+function setPoses(model, hand)
+  -- get hand pose skeleton from controller
+  pose_skeleton = lovr.headset.getSkeleton(hand)
+
+  -- check controller exists
+  if not (pose_skeleton == nil) then
+    -- go through the 28 bones in the vr_glove model
+    for i=1,28 do
+      -- get the name of the node from the model
+      node_name = model:getNodeName(i)
+      -- get table with name-to-skeleton-index values
+      hand_table = knuckles.hand_to_index[hand]
+      -- get skeleton index value from table
+      skeleton_index = hand_table[node_name]
+      -- get pose of respective node in skeleton
+      pose = pose_skeleton[skeleton_index]
+
+      -- check if the pose has been instantiated yet
+      if not (pose == nil) then
+        -- set pose of model bone from controller skeleton
+        model:pose(node_name, unpack(pose))
+      end
+    end
+  end
+end
+
+function lovr.load()
+  -- set grey background so we can see the gloves well
+  lovr.graphics.setBackgroundColor(.5, .5, .5)
+  
+  -- make a new shader with animated set true so we can see the moving model
+  shader = lovr.graphics.newShader('unlit', { flags = { animated = true } })
+
+  -- path for SteamVR resources and vr_glove models
+  local vr_glove_path = "C:\\Program Files (x86)\\Steam\\steamapps\\common\\SteamVR\\resources\\rendermodels\\vr_glove\\"
+  local right_model_file = vr_glove_path .. "vr_glove_right_model.glb"
+  local left_model_file = vr_glove_path .. "vr_glove_left_model.glb"
+
+  -- load right vr_glove model data
+  local f = assert(io.open(right_model_file, "rb"))
+  local right_model_data = f:read("*all")
+  f:close()
+
+  -- load left vr_glove model data
+  local f = assert(io.open(left_model_file, "rb"))
+  local left_model_data = f:read("*all")
+  f:close()
+
+  -- convert model data to blobs so we can pass it to newModel
+  local right_blob = lovr.data.newBlob(right_model_data, "right_blob")
+  local left_blob = lovr.data.newBlob(left_model_data, "left_blob")
+
+  -- create model objects to use
+  right_hand_model = lovr.graphics.newModel(right_blob)
+  left_hand_model = lovr.graphics.newModel(left_blob)
+end
+
+function lovr.draw()
+  -- set skin node poses in model
+  setPoses(right_hand_model, 'right')
+  setPoses(left_hand_model, 'left')
+
+  -- use out animated shader
+  lovr.graphics.setShader(shader)
+
+  -- draw right glove at controller position
+  x, y, z, ang, ax, ay, az = lovr.headset.getPose('right')
+  right_hand_model:draw(x, y, z, 1, ang, ax, ay, az)
+
+  -- draw left glove at controller position
+  x, y, z, ang, ax, ay, az = lovr.headset.getPose('left')
+  left_hand_model:draw(x, y, z, 1, ang, ax, ay, az)
+
+  -- clear shader
+  lovr.graphics.setShader()
+end