Add Spectator Camera example;

examples/Spectator_Camera/main.lua

@@ -0,0 +1,105 @@
+function lovr.load()
+  lovr.graphics.setBackgroundColor(.7, .7, .7)
+  lovr.headset.setMirrored(false)
+
+  -- Create a canvas for the camera
+  local w, h = lovr.graphics.getDimensions()
+  cameraCanvas = lovr.graphics.newCanvas(w, h, { stereo = false })
+
+  -- Precompute camera transform (could also be attached to a controller)
+  local x, y, z = -5, 5, 5
+  cameraTransform = lovr.math.newTransform()
+  cameraTransform:translate(x, y, z)
+  cameraTransform:rotate(lovr.math.lookAt(x, y, z, 0, 0, 0))
+  cameraTransform = cameraTransform:inverse()
+end
+
+local function renderScene(isCamera)
+  local t = lovr.timer.getTime()
+
+  -- Draw the ground
+  lovr.graphics.setColor(.15, .15, .15)
+  lovr.graphics.plane('fill', 0, 0, 0, 4, 4, math.pi / 2, 1, 0, 0)
+
+  -- Draw some cubes
+  lovr.graphics.setColor(1, 0, 0)
+  for i = -3, 3 do
+    local ax, ay, az = lovr.math.noise(i + t), lovr.math.noise(i + t * .3), lovr.math.noise(i + t * .7)
+    lovr.graphics.cube('fill', i, 2 + math.sin(i + t), -1, .2, (t * .1) ^ 2 * math.pi, ax, ay, az)
+  end
+
+  -- Draw the headset or the camera, depending on the viewer
+  if isCamera then
+    lovr.graphics.setColor(1, 1, 1)
+    local x, y, z, angle, ax, ay, az = lovr.headset.getPose()
+    lovr.graphics.cube('fill', x, y, z, .2, angle, ax, ay, az)
+  else
+    lovr.graphics.setColor(1, 1, 1)
+    lovr.graphics.cube('fill', cameraTransform:inverse())
+  end
+
+  -- Always draw the controllers
+  for i, controller in ipairs(lovr.headset.getControllers()) do
+    local x, y, z, angle, ax, ay, az = controller:getPose()
+    lovr.graphics.cube('fill', x, y, z, .06, angle, ax, ay, az)
+  end
+end
+
+-- Renders the scene to the camera canvas using the camera transform, then renders the camera
+-- canvas to the window
+local function renderCamera()
+  lovr.graphics.setCanvas(cameraCanvas)
+  lovr.graphics.clear()
+  lovr.graphics.origin()
+  lovr.graphics.transform(cameraTransform)
+  renderScene(true)
+  lovr.graphics.setCanvas()
+  lovr.graphics.setColor(1, 1, 1)
+  lovr.graphics.fill(cameraCanvas)
+end
+
+function lovr.draw()
+  renderScene(false)
+end
+
+-- Override the default lovr.run to render the camera after rendering to the headset
+function lovr.run()
+  lovr.timer.step()
+  if lovr.load then lovr.load() end
+  return function()
+    lovr.event.pump()
+    for name, a, b, c, d in lovr.event.poll() do
+      if name == 'quit' and (not lovr.quit or not lovr.quit()) then
+        return a or 0
+      end
+      if lovr.handlers[name] then lovr.handlers[name](a, b, c, d) end
+    end
+    local dt = lovr.timer.step()
+    if lovr.headset then
+      lovr.headset.update(dt)
+    end
+    if lovr.audio then
+      lovr.audio.update()
+      if lovr.headset then
+        lovr.audio.setOrientation(lovr.headset.getOrientation())
+        lovr.audio.setPosition(lovr.headset.getPosition())
+        lovr.audio.setVelocity(lovr.headset.getVelocity())
+      end
+    end
+    if lovr.update then lovr.update(dt) end
+    if lovr.graphics then
+      lovr.graphics.origin()
+      if lovr.draw then
+        if lovr.headset then
+          lovr.headset.renderTo(lovr.draw)
+        else
+          lovr.graphics.clear()
+          lovr.draw()
+        end
+
+        renderCamera()
+      end
+      lovr.graphics.present()
+    end
+  end
+end