Faces stuff + simple camera rotation

1 files changed, 42 insertions, 12 deletions

diff --git a/src/main/kotlin/phenax/extensions/CameraManager.kt b/src/main/kotlin/phenax/extensions/CameraManager.kt
index ab2403c..0303a54 100644
--- a/src/main/kotlin/phenax/extensions/CameraManager.kt
+++ b/src/main/kotlin/phenax/extensions/CameraManager.kt
@@ -1,55 +1,79 @@
 package phenax.extensions
 
+import kotlin.math.absoluteValue
 import org.openrndr.*
 import org.openrndr.color.*
 import org.openrndr.draw.*
+import org.openrndr.math.Quaternion
+import org.openrndr.math.Vector2
 import org.openrndr.math.Vector3
 import phenax.utils.recordingEnabled
 
 enum class ActionType {
   PAN,
-  LIGHT_MOVE
+  ROTATE
 }
 
-class CameraManager : Extension {
+class CameraManager(public var cameraPosition: Vector3, public var cameraRotation: Vector3) :
+        Extension {
   override var enabled: Boolean = true
 
-  public var cameraPosition: Vector3 = Vector3(0.0, 1.0, 0.0)
+  public var cameraQuaternion: Quaternion = Quaternion.IDENTITY
   public var lightPosition: Vector3 = Vector3(1.0, 2.0, 1.0)
 
   var font: FontImageMap? = null
   var actionType: ActionType? = null
   var lastPos: Vector3? = null
 
+  constructor() : this(Vector3(0.0, 1.0, 0.0), Vector3.ZERO) {}
+
   override fun setup(program: Program) {
     if (recordingEnabled) return
 
+    cameraQuaternion = Quaternion.fromAngles(cameraRotation.x, cameraRotation.y, cameraRotation.z)
+
     font = program.loadFont("data/fonts/default.otf", 16.0)
 
-    program.keyboard.keyDown.listen { if (it.key == KEY_ESCAPE) program.application.exit() }
+    program.keyboard.keyDown.listen {
+      when (it.name) {
+        "escape" -> program.application.exit()
+        "x" -> cameraQuaternion = Quaternion.IDENTITY
+        "y" -> cameraQuaternion = Quaternion.fromAngles(0.0, -90.0, 0.0)
+        "z" -> cameraQuaternion = Quaternion.fromAngles(90.0, 0.0, 0.0)
+      }
+    }
 
     program.mouse.moved.listen {
       val dimens = Vector3(program.width.toDouble(), program.height.toDouble(), 1.0)
-      val pos = (Vector3(it.position.x, -it.position.y, 0.0) - dimens / 2.0).div(dimens)
+      var pos = (Vector3(it.position.x, -it.position.y, 0.0) - dimens / 2.0).div(dimens)
+      pos = cameraQuaternion.inversed.matrix * pos
+      val increment = lastPos?.let { pos - it }
       if (actionType == ActionType.PAN) {
-        lastPos?.let { lastPos -> cameraPosition -= (pos - lastPos) }
-      } else if (actionType == ActionType.LIGHT_MOVE) {
-        lastPos?.let { lastPos -> lightPosition += (pos - lastPos) }
+        increment?.let { cameraPosition -= it }
+      } else if (actionType == ActionType.ROTATE) {
+        increment?.let {
+          val mag = 10.0
+          val rot =
+                  if (it.x.absoluteValue >= it.y.absoluteValue) Vector2(it.x * mag, 0.0)
+                  else Vector2(0.0, it.y * mag)
+          cameraQuaternion *= Quaternion.fromAngles(rot.x, rot.y, 0.0)
+        }
+        // lastPos?.let { lastPos -> lightPosition += (pos - lastPos) }
       }
       actionType?.let { lastPos = pos }
     }
 
     program.mouse.buttonDown.listen {
       val isCtrl = KeyModifier.CTRL in it.modifiers
-      actionType = if (isCtrl) ActionType.LIGHT_MOVE else ActionType.PAN
+      actionType = if (isCtrl) ActionType.ROTATE else ActionType.PAN
     }
 
     program.mouse.scrolled.listen {
       val isCtrl = KeyModifier.CTRL in it.modifiers
       if (isCtrl) {
-        lightPosition += Vector3(0.0, 0.0, it.rotation.y * 0.1)
+        cameraQuaternion *= Quaternion.fromAngles(it.rotation.y, 0.0, 0.0)
       } else {
-        cameraPosition += Vector3(0.0, 0.0, it.rotation.y * 0.1)
+        cameraPosition += cameraQuaternion.inversed.matrix * Vector3(0.0, 0.0, it.rotation.y * 0.1)
       }
     }
 
@@ -61,7 +85,8 @@ class CameraManager : Extension {
 
   fun setUniforms(cs: ComputeShader) {
     cs.uniform("camera_position", cameraPosition)
-    cs.uniform("primary_light_position", lightPosition)
+    cs.uniform("camera_transformation", cameraQuaternion.matrix)
+    cs.uniform("key_light_position", lightPosition)
   }
 
   override fun beforeDraw(drawer: Drawer, program: Program) {}
@@ -81,5 +106,10 @@ class CameraManager : Extension {
             8.0,
             32.0
     )
+    drawer.text(
+            "L: %.2f %.2f %.2f".format(lightPosition.x, lightPosition.y, lightPosition.z),
+            8.0,
+            32.0
+    )
   }
 }