1 files changed, 85 insertions, 0 deletions
diff --git a/src/main/kotlin/phenax/extensions/CameraManager.kt b/src/main/kotlin/phenax/extensions/CameraManager.kt
new file mode 100644
index 0000000..ab2403c
--- /dev/null
+++ b/src/main/kotlin/phenax/extensions/CameraManager.kt
@@ -0,0 +1,85 @@
+package phenax.extensions
+
+import org.openrndr.*
+import org.openrndr.color.*
+import org.openrndr.draw.*
+import org.openrndr.math.Vector3
+import phenax.utils.recordingEnabled
+
+enum class ActionType {
+  PAN,
+  LIGHT_MOVE
+}
+
+class CameraManager : Extension {
+  override var enabled: Boolean = true
+
+  public var cameraPosition: Vector3 = Vector3(0.0, 1.0, 0.0)
+  public var lightPosition: Vector3 = Vector3(1.0, 2.0, 1.0)
+
+  var font: FontImageMap? = null
+  var actionType: ActionType? = null
+  var lastPos: Vector3? = null
+
+  override fun setup(program: Program) {
+    if (recordingEnabled) return
+
+    font = program.loadFont("data/fonts/default.otf", 16.0)
+
+    program.keyboard.keyDown.listen { if (it.key == KEY_ESCAPE) program.application.exit() }
+
+    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)
+      if (actionType == ActionType.PAN) {
+        lastPos?.let { lastPos -> cameraPosition -= (pos - lastPos) }
+      } else if (actionType == ActionType.LIGHT_MOVE) {
+        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
+    }
+
+    program.mouse.scrolled.listen {
+      val isCtrl = KeyModifier.CTRL in it.modifiers
+      if (isCtrl) {
+        lightPosition += Vector3(0.0, 0.0, it.rotation.y * 0.1)
+      } else {
+        cameraPosition += Vector3(0.0, 0.0, it.rotation.y * 0.1)
+      }
+    }
+
+    program.mouse.buttonUp.listen {
+      actionType = null
+      lastPos = null
+    }
+  }
+
+  fun setUniforms(cs: ComputeShader) {
+    cs.uniform("camera_position", cameraPosition)
+    cs.uniform("primary_light_position", lightPosition)
+  }
+
+  override fun beforeDraw(drawer: Drawer, program: Program) {}
+
+  override fun afterDraw(drawer: Drawer, program: Program) {
+    if (recordingEnabled) return
+
+    drawer.fontMap = font
+    drawer.fill = ColorRGBa.WHITE
+    drawer.text(
+            "C: %.2f %.2f %.2f".format(cameraPosition.x, cameraPosition.y, cameraPosition.z),
+            8.0,
+            16.0
+    )
+    drawer.text(
+            "L: %.2f %.2f %.2f".format(lightPosition.x, lightPosition.y, lightPosition.z),
+            8.0,
+            32.0
+    )
+  }
+}