modify raycast.

Assets/uDesktopDuplication/Examples/Scenes/Raycast.unity.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: f68bd0626da87264cb4daca57d3c1594
+timeCreated: 1481736541
+licenseType: Pro
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/uDesktopDuplication/Examples/Scripts/RaycastTest.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+using System.Collections;
+
+public class RaycastTest : MonoBehaviour
+{
+    public Transform from;
+    public Transform to;
+
+    void Update()
+    {
+        if (!from || !to) return;
+
+        Debug.DrawLine(from.position, to.position, Color.red);
+
+        foreach (var uddTexture in GameObject.FindObjectsOfType<uDesktopDuplication.Texture>()) {
+            var result = uddTexture.RayCast(from.position, to.position - from.position);
+            if (result.hit) {
+                Debug.DrawLine(result.position, result.position + result.normal, Color.yellow);
+                Debug.Log("COORD: " + result.coords + ", DESKTOP: " + result.desktopCoord);
+            }
+        }
+    }
+}

Assets/uDesktopDuplication/Examples/Scripts/RaycastTest.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 810a4ad59c7d8d34e9b6014e8191fffe
+timeCreated: 1481722966
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/uDesktopDuplication/Scripts/Texture.cs

@@ -73,7 +73,7 @@ public class Texture : MonoBehaviour
         {
             return monitor.rotation;
         }
-        set
+        private set
         {
             switch (value)
             {
@@ -114,6 +114,7 @@ public class Texture : MonoBehaviour
         }
         set
         {
+            useClip_ = value;
             if (useClip_) {
                 material.EnableKeyword("USE_CLIP");
             } else {
@@ -286,6 +287,11 @@ public class Texture : MonoBehaviour
         material.SetVector("_ClipPositionScale", new Vector4(clipPos.x, clipPos.y, clipScale.x, clipScale.y));
     }
 
+    public Vector3 GetWorldPositionFromCoord(Vector2 coord)
+    {
+        return GetWorldPositionFromCoord((int)coord.x, (int)coord.y);
+    }
+
     public Vector3 GetWorldPositionFromCoord(int u, int v)
     {
         // Local position (scale included).
@@ -307,6 +313,119 @@ public class Texture : MonoBehaviour
         // To world position
         return transform.position + (transform.rotation * localPos);
     }
+
+    public struct RayCastResult
+    {
+        public bool hit;
+        public Texture texture;
+        public Vector3 position;
+        public Vector3 normal;
+        public Vector2 coords;
+        public Vector2 desktopCoord;
+    }
+
+    static readonly RayCastResult raycastFailedResult = new RayCastResult {
+        hit          = false,
+        texture      = null,
+        position     = Vector3.zero,
+        normal       = Vector3.forward,
+        coords       = Vector2.zero,
+        desktopCoord = Vector2.zero,
+    };
+
+    // This function can be used only for vertical (= MeshForwardDirection.Z) plane.
+    public RayCastResult RayCast(Vector3 from, Vector3 dir)
+    {
+        var r = radius;
+        var center = transform.position - transform.forward * r;
+
+        // Localize the start point of the ray and the direction.
+        var trs = Matrix4x4.TRS(center, transform.rotation, Vector3.one);
+        var invTrs = trs.inverse;
+        Vector3 localFrom = invTrs.MultiplyPoint3x4(from);
+        Vector3 localDir = invTrs.MultiplyVector(dir).normalized;
+
+        // Calculate the intersection points of circle and line on the X-Z plane.
+        var a = localDir.z / localDir.x;
+        var b = localFrom.z - a * localFrom.x;
+
+        var aa = a * a;
+        var bb = b * b;
+        var ab = a * b;
+        var rr = r * r;
+
+        var s = aa * rr - bb + rr;
+        if (s < 0f) {
+            return raycastFailedResult;
+        }
+        s = Mathf.Sqrt(s);
+
+        var t = aa + 1;
+
+        var lx0 = (-s - ab) / t;
+        var lz0 = (b - a * s) / t;
+        var to0 = new Vector3(lx0, 0f, lz0);
+
+        var lx1 = (s - ab) / t;
+        var lz1 = (a * s + b) / t;
+        var to1 = new Vector3(lx1, 0f, lz1);
+
+        var to = (Vector3.Dot(localDir, to0) > 0f) ? to0 : to1;
+
+        // Check if the point is inner angle of mesh width.
+        var toAngle = Mathf.Atan2(to.x, to.z);
+        var halfWidthAngle = (worldWidth / radius) * 0.5f;
+        if (Mathf.Abs(toAngle) > halfWidthAngle) {
+            return raycastFailedResult;
+        }
+
+        // Calculate the intersection points on XZ-Y plane.
+        var v = to - localFrom;
+        var l = Mathf.Sqrt(Mathf.Pow(v.x, 2f) + Mathf.Pow(v.z, 2f));
+        var ly = localFrom.y + l * localDir.y / Mathf.Sqrt(Mathf.Pow(localDir.x, 2f) + Mathf.Pow(localDir.z, 2f));
+
+        // Check if the point is inner mesh height.
+        var halfHeight = worldHeight * 0.5f;
+        if (Mathf.Abs(ly) > halfHeight) {
+            return raycastFailedResult;
+        }
+
+        // Check hit position is in the range of the ray.
+        to.y = ly;
+        var hitPos = trs.MultiplyPoint(to);
+
+        if ((hitPos - from).magnitude > dir.magnitude) {
+            return raycastFailedResult;
+        }
+
+        // Calculate coordinates.
+        var coordX = toAngle / halfWidthAngle * 0.5f;
+        var coordY = ly / halfHeight * 0.5f;
+        int desktopX = monitor.left + (int)((coordX + 0.5f) * monitor.width);
+        int desktopY = monitor.top + (int)((0.5f - coordY) * monitor.height);
+
+        // Calculate normal.
+        var normal = new Vector3(-to.x, 0f, -to.z);
+
+        // Result
+        return new RayCastResult {
+            hit = true,
+            texture = this,
+            position = trs.MultiplyPoint(to),
+            normal = trs.MultiplyVector(normal).normalized,
+            coords = new Vector2(coordX, coordY),
+            desktopCoord = new Vector2(desktopX, desktopY)
+        };
+    }
+
+    public static RayCastResult RayCastAll(Vector3 from, Vector3 dir)
+    {
+        foreach (var uddTexture in GameObject.FindObjectsOfType<uDesktopDuplication.Texture>()) {
+            var result = uddTexture.RayCast(from, dir);
+            if (result.hit) return result;
+        }
+        return raycastFailedResult;
+    }
 }
 
 }

Assets/uDesktopDuplication/Shaders/uDD_Common.cginc

@@ -95,9 +95,9 @@ inline void uddBendVertex(inout float3 v, half radius, half width, half thicknes
     v.x = radius * sin(angle) / width;
 #else
     #ifdef _FORWARD_Z
-    v.y *= thickness;
-    #elif _FORWARD_Y
     v.z *= thickness;
+    #elif _FORWARD_Y
+    v.y *= thickness;
     #endif
 #endif
 }

Assets/uDesktopDuplication/Shaders/uDD_Standard.shader

@@ -43,6 +43,7 @@ SubShader
 
     void vert(inout appdata_full v)
     {
+        uddBendNormal(v.vertex.x, v.normal, _Radius, _Width);
         uddBendVertex(v.vertex.xyz, _Radius, _Width, _Thickness);
     }