【unity】模型控制句柄（类似编辑面板） |
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【unity】模型控制句柄（类似编辑面板）
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【unity】简单实现模型控制句柄（类似编辑面板）
使用GL绘制控制句柄，实现定位、旋转、伸缩变形，类似编辑面板的模型编辑的功能。
工程文件下载地址 使用方法实时控制 核心方法： TransformControl.Control(); 设置控制目标 核心方法：TransformControl.TargetObjct() demo public TransformControl transformControl; public GameObject Target; void Update() { if (Target) { transformControl.Control(); } if (Input.GetMouseButton(1)) { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out hit)) { Target = hit.collider.gameObject; transformControl.TargetObjct = Target.transform; } } }切换模式 核心方法： TransformControl.mode() demo void Update() { if (Input.GetKey(KeyCode.W)) { //平移 mode = TransformMode.Translate; transformControl.mode = mode; } if (Input.GetKey(KeyCode.R)) { //旋转 mode = TransformMode.Rotate; transformControl.mode = mode; } if (Input.GetKey(KeyCode.S)) { //缩放 mode = TransformMode.Scale; transformControl.mode = mode; } }拖拽事件 核心方法： TransformControl.DragEvent.AddListener(open); demo void Start() { transformControl.DragEvent.AddListener(open); } void open() { Debug.Log("句柄拖拽中"); } 源码TransformControl 主功能方法 using System.Linq; using System.Collections.Generic; using UnityEngine; using UnityEngine.Rendering; using UnityEngine.Events; namespace TransformControlUser { public class MyBaseHandle : UnityEvent{ } public class TransformControl : MonoBehaviour { [System.Serializable] class TransformData { public Vector3 position; public Quaternion rotation; public Vector3 scale; Matrix4x4 matrix; public TransformData(Vector3 p, Quaternion r, Vector3 s) { position = p; rotation = r; scale = s; matrix = Matrix4x4.TRS(p, r, s); } public TransformData(Transform tr) : this(tr.position, tr.rotation, tr.localScale) {} public Vector3 TransformPoint (Vector3 p) { return matrix.MultiplyPoint(p); } } public enum TransformMode { None, Translate, Rotate, Scale }; public enum TransformDirection { None, X, Y, Z }; // protected const string SHADER = "Hidden/Internal-Colored"; protected const string SHADER = "Battlehub/RTHandles/VertexColorClip"; protected const float THRESHOLD = 10f; protected const float HANDLER_SIZE = 0.2f; protected Material material { get { if (_material == null) { var shader = Shader.Find(SHADER); if (shader == null) Debug.LogErrorFormat("Shader not found : {0}", SHADER); _material = new Material(shader); } return _material; } } public TransformMode mode = TransformMode.Translate; public bool global, useDistance; public float distance = 20f; public Transform TargetObjct; public MyBaseHandle DragEvent = new MyBaseHandle(); Color[] colors = new Color[] { Color.red, Color.green, Color.blue, Color.yellow }; Dictionary axes = new Dictionary() { { TransformDirection.X, Vector3.right }, { TransformDirection.Y, Vector3.up }, { TransformDirection.Z, Vector3.forward } }; Matrix4x4[] matrices = new Matrix4x4[] { Matrix4x4.TRS(Vector3.right, Quaternion.AngleAxis(90f, Vector3.back), Vector3.one), Matrix4x4.TRS(Vector3.up, Quaternion.identity, Vector3.one), Matrix4x4.TRS(Vector3.forward, Quaternion.AngleAxis(90f, Vector3.right), Vector3.one) }; Material _material; Vector3 start; bool dragging; TransformData prev; Mesh cone; Mesh cube; TransformDirection selected = TransformDirection.None; #region Circumference const int SPHERE_RESOLUTION = 32; List circumX; List circumY; List circumZ; #endregion void Awake() { cone = CreateCone(5, 0.1f, HANDLER_SIZE); cube = CreateCube(HANDLER_SIZE); GetCircumference(SPHERE_RESOLUTION, out circumX, out circumY, out circumZ); } /// /// 实时控制 /// public void Control () { if (Input.GetMouseButtonDown(0)) { dragging = true; start = Input.mousePosition; prev = new TransformData(TargetObjct); Pick(); } else if (Input.GetMouseButtonUp(0)) { dragging = false; selected = TransformDirection.None; } if(dragging) { Drag(); } } public bool Pick () { return Pick(Input.mousePosition); } public bool Pick (Vector3 mouse) { selected = TransformDirection.None; switch(mode) { case TransformMode.Translate: case TransformMode.Scale: return PickOrthogonal(mouse); case TransformMode.Rotate: return PickSphere(mouse); } return false; } Matrix4x4 GetTranform() { float scale = 1f; if(useDistance) { var d = (Camera.main.transform.position - TargetObjct.position).magnitude; scale = d / distance; } return Matrix4x4.TRS(TargetObjct.position, global ? Quaternion.identity : TargetObjct.rotation, Vector3.one * scale); } bool PickOrthogonal (Vector3 mouse) { var cam = Camera.main; var matrix = GetTranform(); var origin = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.zero)).xy(); var right = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.right)).xy() - origin; var rightHead = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.right * (1f + HANDLER_SIZE))).xy() - origin; var up = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.up)).xy() - origin; var upHead = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.up * (1f + HANDLER_SIZE))).xy() - origin; var forward = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.forward)).xy() - origin; var forwardHead = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.forward * (1f + HANDLER_SIZE))).xy() - origin; var v = mouse.xy() - origin; var vl = v.magnitude; // 为每个量级添加阈值以忽略方向 var xl = v.Orth(right).magnitude; if(Vector2.Dot(v, right) rightHead.magnitude) xl += THRESHOLD; var yl = v.Orth(up).magnitude; if(Vector2.Dot(v, up) upHead.magnitude) yl += THRESHOLD; var zl = v.Orth(forward).magnitude; if(Vector2.Dot(v, forward) forwardHead.magnitude) zl += THRESHOLD; if (xl < yl && xl < zl && xl < THRESHOLD) { selected = TransformDirection.X; } else if (yl < xl && yl < zl && yl < THRESHOLD) { selected = TransformDirection.Y; } else if (zl < xl && zl < yl && zl < THRESHOLD) { selected = TransformDirection.Z; } return selected != TransformDirection.None; } bool PickSphere(Vector3 mouse) { var cam = Camera.main; var matrix = GetTranform(); var v = mouse.xy(); var x = circumX.Select(p => cam.WorldToScreenPoint(matrix.MultiplyPoint(p)).xy()).ToList(); var y = circumY.Select(p => cam.WorldToScreenPoint(matrix.MultiplyPoint(p)).xy()).ToList(); var z = circumZ.Select(p => cam.WorldToScreenPoint(matrix.MultiplyPoint(p)).xy()).ToList(); float xl, yl, zl; xl = yl = zl = float.MaxValue; for(int i = 0; i < SPHERE_RESOLUTION; i++) { xl = Mathf.Min(xl, (v - x[i]).magnitude); yl = Mathf.Min(yl, (v - y[i]).magnitude); zl = Mathf.Min(zl, (v - z[i]).magnitude); } if (xl < yl && xl < zl && xl < THRESHOLD) { selected = TransformDirection.X; } else if (yl < xl && yl < zl && yl < THRESHOLD) { selected = TransformDirection.Y; } else if (zl < xl && zl < yl && zl < THRESHOLD) { selected = TransformDirection.Z; } return selected != TransformDirection.None; } /// /// 得到旋转句柄圆点 /// /// 圆段数 /// /// /// void GetCircumference (int resolution, out List x, out List y, out List z) { x = new List(); y = new List(); z = new List(); var pi2 = Mathf.PI * 2f; for(int i = 0; i < resolution; i++) { var r = (float)i / resolution * pi2; x.Add(new Vector3(0f, Mathf.Cos(r), Mathf.Sin(r))); y.Add(new Vector3(Mathf.Cos(r), 0f, Mathf.Sin(r))); z.Add(new Vector3(Mathf.Cos(r), Mathf.Sin(r), 0f)); } } bool GetStartProj (out Vector3 proj) { proj = default(Vector3); var plane = new Plane((Camera.main.transform.position - prev.position).normalized, prev.position); var ray = Camera.main.ScreenPointToRay(start); float distance; if(plane.Raycast(ray, out distance)) { var point = ray.GetPoint(distance); var axis = global ? axes[selected] : prev.rotation * axes[selected]; var dir = point - prev.position; proj = Vector3.Project(dir, axis.normalized); return true; } return false; } /// /// 得到相机和目标的距离 /// /// float GetStartDistance () { Vector3 proj; if(GetStartProj(out proj)) { return proj.magnitude; } return 0f; } void Drag() { switch (mode) { case TransformMode.Translate: Translate(); break; case TransformMode.Rotate: Rotate(); break; case TransformMode.Scale: Scale(); break; } } /// /// 执行拖拽事件 /// void DragEventRun() { if (DragEvent != null) { DragEvent.Invoke(); } } /// /// 移动控制 /// void Translate() { if (selected == TransformDirection.None) return; var plane = new Plane((Camera.main.transform.position - prev.position).normalized, prev.position); var ray = Camera.main.ScreenPointToRay(Input.mousePosition); float distance; if(plane.Raycast(ray, out distance)) { var point = ray.GetPoint(distance); var axis = global ? axes[selected] : prev.rotation * axes[selected]; var dir = point - prev.position; var proj = Vector3.Project(dir, axis.normalized); Vector3 start; if(GetStartProj(out start)) { var offset = start.magnitude; var cur = proj.magnitude; if(Vector3.Dot(start, proj) >= 0f) { proj = (cur - offset) * proj.normalized; } else { proj = (cur + offset) * proj.normalized; } } DragEventRun(); TargetObjct.position = prev.position + proj; } } /// /// 旋转控制 /// void Rotate() { if (selected == TransformDirection.None) return; var matrix = Matrix4x4.TRS(prev.position, global ? Quaternion.identity : prev.rotation, Vector3.one); var cur = Input.mousePosition.xy(); var cam = Camera.main; var origin = cam.WorldToScreenPoint(matrix.MultiplyPoint(Vector3.zero)).xy(); var axis = cam.WorldToScreenPoint(matrix.MultiplyPoint(axes[selected])).xy(); var perp = (origin - axis).Perp().normalized; var dir = (cur - start.xy()); var proj = dir.Project(perp); var rotateAxis = axes[selected]; if(global) rotateAxis = Quaternion.Inverse(prev.rotation) * rotateAxis; TargetObjct.rotation = prev.rotation * Quaternion.AngleAxis(proj.magnitude * (Vector2.Dot(dir, perp) > 0f ? 1f : -1f), rotateAxis); DragEventRun(); } /// /// 缩放控制 /// void Scale() { if (selected == TransformDirection.None) return; var plane = new Plane((Camera.main.transform.position - TargetObjct.position).normalized, prev.position); var ray = Camera.main.ScreenPointToRay(Input.mousePosition); float distance; if(plane.Raycast(ray, out distance)) { var point = ray.GetPoint(distance); var axis = global ? axes[selected] : prev.rotation * axes[selected]; var dir = point - prev.position; var proj = Vector3.Project(dir, axis.normalized); var offset = GetStartDistance(); var mag = 0f; if(proj.magnitude < offset) { mag = 1f - (offset - proj.magnitude) / offset; } else { mag = proj.magnitude / offset; } var scale = TargetObjct.localScale; switch(selected) { case TransformDirection.X: scale.x = prev.scale.x * mag; break; case TransformDirection.Y: scale.y = prev.scale.y * mag; break; case TransformDirection.Z: scale.z = prev.scale.z * mag; break; } DragEventRun(); TargetObjct.localScale = scale; } } void OnRenderObject() { if (mode == TransformMode.None) return; GL.PushMatrix(); GL.MultMatrix(GetTranform()); switch (mode) { case TransformMode.Translate: DrawTranslate(); break; case TransformMode.Rotate: DrawRotate(); break; case TransformMode.Scale: DrawScale(); break; } GL.PopMatrix(); } /// /// 绘制GL /// /// /// /// void DrawLine (Vector3 start, Vector3 end, Color color) { GL.Begin(GL.LINES); GL.Color(color); GL.Vertex(start); GL.Vertex(end); GL.End(); } /// /// mesh转GL /// /// /// /// void DrawMesh (Mesh mesh, Matrix4x4 m, Color color) { GL.Begin(GL.TRIANGLES); GL.Color(color); var vertices = mesh.vertices; for (int i = 0, n = vertices.Length; i < n; i++) { vertices[i] = m.MultiplyPoint(vertices[i]); } var triangles = mesh.triangles; for (int i = 0, n = triangles.Length; i < n; i += 3) { int a = triangles[i], b = triangles[i + 1], c = triangles[i + 2]; GL.Vertex(vertices[a]); GL.Vertex(vertices[b]); GL.Vertex(vertices[c]); } GL.End(); } /// /// 绘制移动句柄 /// void DrawTranslate () { material.SetInt("_ZTest", (int)CompareFunction.Always); material.SetInt("_Cull", (int)UnityEngine.Rendering.CullMode.Off); material.SetPass(0); var color = selected == TransformDirection.X ? colors[3] : colors[0]; DrawLine(Vector3.zero, Vector3.right, color); DrawMesh(cone, matrices[0], color); color = selected == TransformDirection.Y ? colors[3] : colors[1]; DrawLine(Vector3.zero, Vector3.up, color); DrawMesh(cone, matrices[1], color); color = selected == TransformDirection.Z ? colors[3] : colors[2]; DrawLine(Vector3.zero, Vector3.forward, color); DrawMesh(cone, matrices[2], color); } /// /// 绘制旋转句柄 /// void DrawRotate () { material.SetInt("_ZTest", (int)CompareFunction.Always); material.SetPass(0); GL.Begin(GL.LINES); var color = selected == TransformDirection.X ? colors[3] : colors[0]; GL.Color(color); for(int i = 0; i < SPHERE_RESOLUTION; i++) { var cur = circumX[i]; var next = circumX[(i + 1) % SPHERE_RESOLUTION]; GL.Vertex(cur); GL.Vertex(next); } GL.End(); GL.Begin(GL.LINES); color = selected == TransformDirection.Y ? colors[3] : colors[1]; GL.Color(color); material.SetPass(0); for(int i = 0; i < SPHERE_RESOLUTION; i++) { var cur = circumY[i]; var next = circumY[(i + 1) % SPHERE_RESOLUTION]; GL.Vertex(cur); GL.Vertex(next); } GL.End(); GL.Begin(GL.LINES); color = selected == TransformDirection.Z ? colors[3] : colors[2]; GL.Color(color); material.SetPass(0); for(int i = 0; i < SPHERE_RESOLUTION; i++) { var cur = circumZ[i]; var next = circumZ[(i + 1) % SPHERE_RESOLUTION]; GL.Vertex(cur); GL.Vertex(next); } GL.End(); } /// /// 绘制缩放句柄 /// void DrawScale () { material.SetInt("_ZTest", (int)CompareFunction.Always); material.SetPass(0); var color = selected == TransformDirection.X ? colors[3] : colors[0]; DrawLine(Vector3.zero, Vector3.right, color); DrawMesh(cube, matrices[0], color); color = selected == TransformDirection.Y ? colors[3] : colors[1]; DrawLine(Vector3.zero, Vector3.up, color); DrawMesh(cube, matrices[1], color); color = selected == TransformDirection.Z ? colors[3] : colors[2]; DrawLine(Vector3.zero, Vector3.forward, color); DrawMesh(cube, matrices[2], color); } #region Mesh /// /// 创建箭头mesh /// /// /// /// /// Mesh CreateCone(int subdivisions, float radius, float height) { Mesh mesh = new Mesh(); Vector3[] vertices = new Vector3[subdivisions + 2]; int[] triangles = new int[(subdivisions * 2) * 3]; vertices[0] = Vector3.zero; for (int i = 0, n = subdivisions - 1; i < subdivisions; i++) { float ratio = (float)i / n; float r = ratio * (Mathf.PI * 2f); float x = Mathf.Cos(r) * radius; float z = Mathf.Sin(r) * radius; vertices[i + 1] = new Vector3(x, 0f, z); } vertices[subdivisions + 1] = new Vector3(0f, height, 0f); for (int i = 0, n = subdivisions - 1; i < n; i++) { int offset = i * 3; triangles[offset] = 0; triangles[offset + 1] = i + 1; triangles[offset + 2] = i + 2; } int bottomOffset = subdivisions * 3; for (int i = 0, n = subdivisions - 1; i < n; i++) { int offset = i * 3 + bottomOffset; triangles[offset] = i + 1; triangles[offset + 1] = subdivisions + 1; triangles[offset + 2] = i + 2; } mesh.vertices = vertices; mesh.triangles = triangles; return mesh; } /// /// 创建方块mesh /// /// /// Mesh CreateCube(float size) { var mesh = new Mesh(); var hsize = size * 0.5f; mesh.vertices = new Vector3[] { new Vector3 (-hsize, -hsize, -hsize), new Vector3 ( hsize, -hsize, -hsize), new Vector3 ( hsize, hsize, -hsize), new Vector3 (-hsize, hsize, -hsize), new Vector3 (-hsize, hsize, hsize), new Vector3 ( hsize, hsize, hsize), new Vector3 ( hsize, -hsize, hsize), new Vector3 (-hsize, -hsize, hsize), }; mesh.triangles = new int[] { 0, 2, 1, //face front 0, 3, 2, 2, 3, 4, //face top 2, 4, 5, 1, 2, 5, //face right 1, 5, 6, 0, 7, 4, //face left 0, 4, 3, 5, 4, 7, //face back 5, 7, 6, 0, 6, 7, //face bottom 0, 1, 6 }; return mesh; } #endregion } } |
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