【unity】模型控制句柄（类似编辑面板）
【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) <= -float.Epsilon || vl > rightHead.magnitude) xl += THRESHOLD;
var yl = v.Orth(up).magnitude;
if(Vector2.Dot(v, up) <= -float.Epsilon || vl > upHead.magnitude) yl += THRESHOLD;
var zl = v.Orth(forward).magnitude;
if(Vector2.Dot(v, forward) <= -float.Epsilon || vl > 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
///
///
/// 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
///
///
///
///
///
/// 创建方块mesh
///
///
///