1 files changed, 145 insertions, 0 deletions
diff --git a/ShedCalc/RenderController.swift b/ShedCalc/RenderController.swift
new file mode 100644
index 0000000..1a57cb0
--- /dev/null
+++ b/ShedCalc/RenderController.swift
@@ -0,0 +1,145 @@
+//
+//  RenderController.swift
+//  ShedCalc
+//
+//  Created by Jacky Jack on 28/07/2026.
+//
+
+import SwiftUI
+import RealityKit
+
+let BEAM_2x4_WIDTH: Float = 0.02
+let BEAM_2x4_LENGTH: Float = 0.04
+
+struct BeamData {
+      let id: String
+      let position: SIMD3<Float>
+      let height: Float
+      let rotation: SIMD3<Float>
+  }
+
+class RenderController {
+    func createScene(dimensions: SIMD3<Float>, rotation: SIMD2<Float>) -> Entity {
+        let scene = Entity()
+        scene.name = "scene"
+        
+        let box = createBox(dimensions: [1,1,1])
+        scene.addChild(box)
+        
+        let beam0 = createBeam2x4(position: [1,1,0], height: 2.4, rotate: [90,0,0], id: "beam0")
+        scene.addChild(beam0)
+        
+        //let beam1 = createBeam2x4(position: [1,0,0], height: 2.4, rotate: [0,0,0], id: "beam1")
+        //scene.addChild(beam1)
+        
+        //let beam2 = createBeam2x4(position: [1,1,0], height: 2.4, rotate: [0,0,90], id: "beam2") //Z-around beam
+        //scene.addChild(beam2)
+        
+        //let beam3 = createBeam2x4(position: [1,1,0], height: 2.4, rotate: [0,90,0], id: "beam3")
+        //scene.addChild(beam3)
+        
+        let ground = createGround()
+        scene.addChild(ground)
+        
+        return scene
+    }
+    
+    func createLights() -> (DirectionalLight, PointLight) {
+        let directional = DirectionalLight()
+        directional.light.intensity = 2000
+        directional.look(at: .zero, from: [2, 4, 3], relativeTo: nil)
+
+        let point = PointLight()
+        point.light.intensity = 5000
+        point.position = [-2, 2, -2]
+
+        return (directional, point)
+    }
+    
+    func createCamera() -> PerspectiveCamera {
+        let camera = PerspectiveCamera()
+        camera.camera.fieldOfViewInDegrees = 60
+        camera.position = [0,1,5]
+        camera.look(at: .zero, from: camera.position, relativeTo: nil)
+        return camera
+    }
+    
+    // MARK: - Gesture Handling
+
+    func handleDragGesture(
+        _ value: DragGesture.Value,
+        lastDrag: CGSize,
+        currentRotation: SIMD2<Float>
+    ) -> (rotation: SIMD2<Float>, drag: CGSize) {
+        let dx = Float(value.translation.width - lastDrag.width) * 0.01
+        let dy = Float(value.translation.height - lastDrag.height) * 0.01
+
+        let newRotation = SIMD2<Float>(
+            currentRotation.x + dy,
+            currentRotation.y + dx
+        )
+
+        return (rotation: newRotation, drag: value.translation)
+    }
+    
+    // MARK: - Private Helpers
+
+    private func createBox(dimensions: SIMD3<Float>) -> ModelEntity {
+        let box = ModelEntity(
+            mesh: .generateBox(size: dimensions, cornerRadius: 0.02),
+            materials: [SimpleMaterial(color: .yellow, isMetallic: false)]
+        )
+        box.position = [0,0,0]
+        box.name = "box"
+        return box
+    }
+    
+    private func createBeam2x4(position: SIMD3<Float>, height: Float, rotate: SIMD3<Float>, id: String) -> ModelEntity {
+        let box = ModelEntity(
+            mesh: .generateBox(size: SIMD3(BEAM_2x4_WIDTH,BEAM_2x4_LENGTH,height), cornerRadius: 0.02),
+            materials: [SimpleMaterial(color: .yellow, isMetallic: false)]
+        )
+        //box.look(at: position, from: lookFrom, relativeTo: nil)
+        //box.setOrientation(.init(eulerAngles: lookFrom), relativeTo: nil)
+        box.position = position
+        // Create individual axis rotations
+        let pitch = simd_quatf(angle: Float.pi*rotate.x/180.0, axis: [1, 0, 0])  // X-axis
+        let yaw = simd_quatf(angle: Float.pi*rotate.y/180.0, axis: [0, 1, 0])    // Y-axis
+        let roll = simd_quatf(angle: Float.pi*rotate.z/180.0, axis: [0, 0, 1])   // Z-axis
+
+        // Combine rotations (order matters: usually yaw * pitch * roll)
+        box.transform.rotation = yaw * pitch * roll
+        box.name = "beam-\(id)"
+        return box
+    }
+    
+    func generateShedWall(position: SIMD3<Float>, height: Float, widthNum: Int, lengthNum: Int, spaceBeem: Float) -> [BeamData] {
+        var beams: [BeamData] = []
+        var id: Int = 0
+        //Wall 0
+        for i in 0...widthNum {
+            let x0 = Float(i)*spaceBeem
+            beams.append(BeamData(id: "beam\(id)", position: [x0,position.y, position.z], height: height, rotation: [90,0,0]))
+            id += 1
+        }
+        //Wall 1
+        //Wall 2
+        //Wall 3
+        return beams
+    }
+    
+    func createBeams(_ beams: [BeamData]) -> [ModelEntity] {
+        return beams.map { beam in
+            createBeam2x4(position: beam.position, height: beam.height, rotate: beam.rotation, id: beam.id)
+        }
+    }
+
+    private func createGround() -> ModelEntity {
+        let ground = ModelEntity(
+            mesh: .generatePlane(width: 10, depth: 10),
+            materials: [UnlitMaterial(color: .green)]
+        )
+        ground.position.y = -0.5
+        return ground
+    }
+}