public override void OnInspectorGUI()
{
AreaGrassObject _target = AreaGrassObject.Instance;
GUILayout.Label("Working mode", EditorStyles.boldLabel);
int _state = GUILayout.Toolbar(_target.state, _target.stateStrings, GUILayout.Height(30));
if ((_target.state == 0) && (_state == 1))
{
// build mesh
if (!BuildMesh())
{
EditorUtility.DisplayDialog("Error...", "Can't build mesh ", "Proceed", "");
return;
}
}
else if ((_target.state == 1) && (_state == 0))
{
_target.state = _state;
EditorUtility.SetDirty(_target);
return;
}
_target.state = _state;
if (_state == 0)
{
if (_target.active_idx >= 0)
{
_target.control_points[_target.active_idx] = EditorGUILayout.Vector3Field("Position", _target.control_points[_target.active_idx]);
EditorUtility.SetDirty(_target);
}
}
}
public void OnSceneGUI()
{
AreaGrassObject _target = AreaGrassObject.Instance;
Event current = Event.current;
int i;
switch (current.type)
{
case EventType.keyDown:
if (current.keyCode == KeyCode.Delete)
{
if (_target.active_idx >= 0)
{
Undo.RecordObject(_target, "delete pos");
_target.control_points.RemoveAt(_target.active_idx);
_target.active_idx = -1;
current.Use();
}
}
break;
case EventType.keyUp:
// current.Use();
break;
case EventType.mouseDown:
//Debug.Log(current +" "+controlID);
float dist;
float min_dist;
_target.active_idx = -1;
// pressing control points
min_dist = 12f;
for (i = 0; i < _target.control_points.Count; i++)
{
dist = Vector2.Distance(current.mousePosition, HandleUtility.WorldToGUIPoint(_target.control_points[i]));
if (dist < min_dist)
{
min_dist = dist;
_target.active_idx = i;
}
}
if (current.control && _target.active_idx == -1)
{
//Vector3 insert_pos = new Vector3(0, 0, 0);
Undo.RecordObject(_target, "add pos");
_target.control_points.Add(GetWorldPointFromMouse());
current.Use();
}
//current.Use();
break;
// case EventType.mouseMove:
// break;
case EventType.mouseDrag:
//current.Use();
break;
case EventType.mouseUp:
//current.Use();
break;
case EventType.layout:
// HandleUtility.AddDefaultControl(controlID);
break;
}
// Node Numbers
for (i = 0; i < _target.control_points.Count; i++)
{
Handles.Label(_target.control_points[i], " " + i);
}
// control_points
for (i = 0; i < _target.control_points.Count; i++)
{
Vector3 vec =
Handles.FreeMoveHandle((_target.control_points[i]),
Quaternion.identity, HandleUtility.GetHandleSize((_target.control_points[i])) * 0.08f, Vector3.one,
Handles.RectangleCap);
Undo.RecordObject(_target, "modify pos");
//vec.y = 0;
_target.control_points[i] = vec;
Handles.DrawLine(_target.control_points[i], _target.control_points[(i + 1) % _target.control_points.Count]);
}
Handles.color = Color.gray;
}
bool BuildRealMesh()
{
GameObject grass = Resources.Load("Q_shiyancao") as GameObject;
GameObject grassParent = GameObject.Find("Grass") as GameObject;
AreaGrassObject _target = AreaGrassObject.Instance;
Vector3 heightOffset = new Vector3(0, _target.height, 0);
Vector2 xMinMax, zMinMax;
Vector3[] keyPoints = new Vector3[4];
getPointsAB(_target.control_points, out xMinMax, out zMinMax, keyPoints);
List <Vector3> intersectPs = new List <Vector3>();
//x
for (float i = xMinMax.x; i < xMinMax.y; i += _target.step)
{
intersectPs = getIntersectPoints(true, i, _target.control_points);
if (intersectPs.Count <= 1)
{
continue;
}
for (int j = 0; j < intersectPs.Count - 1; j += 2)
{
float dis = Vector3.Distance(intersectPs[j], intersectPs[j + 1]);
if (dis == 0)
{
continue;
}
Vector3 dir = intersectPs[j + 1] - intersectPs[j];
dir /= dis;
for (float k = 0; k < dis; k += _target.step)
{
Vector3 pos = intersectPs[j] + dir * k;
GameObject go = Instantiate(grass, pos, Quaternion.identity) as GameObject;
go.transform.parent = grassParent.transform;
}
}
}
////z
//for (float i = zMinMax.x; i < zMinMax.y; i += _target.step)
//{
// intersectPs = getIntersectPoints(false, i, _target.control_points);
// if (intersectPs.Count <= 1)
// continue;
// for (int j = 0; j < intersectPs.Count - 1; j += 2)
// {
// float dis = Vector3.Distance(intersectPs[j], intersectPs[j + 1]);
// if (dis == 0)
// continue;
// vertexs.Add(intersectPs[j]); uvs.Add(new Vector2(0, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 0 + index / 4)); uv3s.Add(new Vector2(0, 0));
// vertexs.Add(intersectPs[j] + heightOffset); uvs.Add(new Vector2(0, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 1 + index / 4)); uv3s.Add(new Vector2(0, 1));
// vertexs.Add(intersectPs[j + 1]); uvs.Add(new Vector2(dis / _target.height / 4, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 0 + index / 4)); uv3s.Add(new Vector2(0, 0));
// vertexs.Add(intersectPs[j + 1] + heightOffset); uvs.Add(new Vector2(dis / _target.height / 4, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 1 + index / 4)); uv3s.Add(new Vector2(0, 1));
// triangles.Add(index);
// triangles.Add(index + 1);
// triangles.Add(index + 2);
// triangles.Add(index + 2);
// triangles.Add(index + 1);
// triangles.Add(index + 3);
// index += 4;
// }
//}
return(true);
}
bool BuildMesh()
{
Mesh grassMesh = new Mesh();
List <Vector3> vertexs = new List <Vector3>();
List <Vector2> uvs = new List <Vector2>();
List <Vector2> uv2s = new List <Vector2>();
List <Vector2> uv3s = new List <Vector2>();
List <Vector3> normals = new List <Vector3>();
List <int> triangles = new List <int>();
int index = 0;
AreaGrassObject _target = AreaGrassObject.Instance;
Vector3 heightOffset = new Vector3(0, _target.height, 0);
Vector2 xMinMax, zMinMax;
Vector3[] keyPoints = new Vector3[4];
getPointsAB(_target.control_points, out xMinMax, out zMinMax, keyPoints);
ProcessPoints(_target.control_points, keyPoints);
List <Vector3> intersectPs = new List <Vector3>();
//边界
for (int i = 0; i < _target.control_points.Count; i++)
{
Vector3 p1 = _target.control_points[i];
Vector3 p2 = _target.control_points[(i + 1) % _target.control_points.Count];
Vector3 dir = p2 - p1;
Vector3 offset = new Vector3(-dir.z, 0, dir.x);
offset = offset.normalized * AreaGrassObject.Instance.step;
float dis = Vector3.Distance(p1, p2);
vertexs.Add(p1 + offset); uvs.Add(new Vector2(0, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 0 + index / 4)); uv3s.Add(new Vector2(1, 0.5f));
vertexs.Add(p1 + heightOffset); uvs.Add(new Vector2(0, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 1 + index / 4)); uv3s.Add(new Vector2(1, 1));
vertexs.Add(p2 + offset); uvs.Add(new Vector2(dis / _target.height / 4, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 0 + index / 4)); uv3s.Add(new Vector2(1, 0.5f));
vertexs.Add(p2 + heightOffset); uvs.Add(new Vector2(dis / _target.height / 4, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 1 + index / 4)); uv3s.Add(new Vector2(1, 1));
triangles.Add(index);
triangles.Add(index + 1);
triangles.Add(index + 2);
triangles.Add(index + 2);
triangles.Add(index + 1);
triangles.Add(index + 3);
index += 4;
}
//x
for (float i = xMinMax.x; i < xMinMax.y; i += _target.step)
{
intersectPs = getIntersectPoints(true, i, _target.control_points);
if (intersectPs.Count <= 1)
{
continue;
}
for (int j = 0; j < intersectPs.Count - 1; j += 2)
{
float dis = Vector3.Distance(intersectPs[j], intersectPs[j + 1]);
if (dis == 0)
{
continue;
}
vertexs.Add(intersectPs[j]); uvs.Add(new Vector2(0, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 0 + index / 4)); uv3s.Add(new Vector2(1, 0));
vertexs.Add(intersectPs[j] + heightOffset); uvs.Add(new Vector2(0, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 1 + index / 4)); uv3s.Add(new Vector2(1, 1));
vertexs.Add(intersectPs[j + 1]); uvs.Add(new Vector2(dis / _target.height / 4, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 0 + index / 4)); uv3s.Add(new Vector2(1, 0));
vertexs.Add(intersectPs[j + 1] + heightOffset); uvs.Add(new Vector2(dis / _target.height / 4, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 1 + index / 4)); uv3s.Add(new Vector2(1, 1));
triangles.Add(index);
triangles.Add(index + 1);
triangles.Add(index + 2);
triangles.Add(index + 2);
triangles.Add(index + 1);
triangles.Add(index + 3);
index += 4;
}
}
//z
for (float i = zMinMax.x; i < zMinMax.y; i += _target.step)
{
intersectPs = getIntersectPoints(false, i, _target.control_points);
if (intersectPs.Count <= 1)
{
continue;
}
for (int j = 0; j < intersectPs.Count - 1; j += 2)
{
float dis = Vector3.Distance(intersectPs[j], intersectPs[j + 1]);
if (dis == 0)
{
continue;
}
vertexs.Add(intersectPs[j]); uvs.Add(new Vector2(0, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 0 + index / 4)); uv3s.Add(new Vector2(0, 0));
vertexs.Add(intersectPs[j] + heightOffset); uvs.Add(new Vector2(0, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(0, 1 + index / 4)); uv3s.Add(new Vector2(0, 1));
vertexs.Add(intersectPs[j + 1]); uvs.Add(new Vector2(dis / _target.height / 4, 0)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 0 + index / 4)); uv3s.Add(new Vector2(0, 0));
vertexs.Add(intersectPs[j + 1] + heightOffset); uvs.Add(new Vector2(dis / _target.height / 4, 1)); normals.Add(new Vector3(0, 1, 0)); uv2s.Add(new Vector2(dis / _target.height / 4, 1 + index / 4)); uv3s.Add(new Vector2(0, 1));
triangles.Add(index);
triangles.Add(index + 1);
triangles.Add(index + 2);
triangles.Add(index + 2);
triangles.Add(index + 1);
triangles.Add(index + 3);
index += 4;
}
}
ProcessUV2(ref uv2s);
grassMesh.SetVertices(vertexs);
grassMesh.SetNormals(normals);
//grassMesh.SetUVs(0, uvs);
grassMesh.SetUVs(1, uv2s);
grassMesh.SetUVs(0, uv3s);
grassMesh.SetTriangles(triangles, 0);
GameObject mobj = new GameObject("AreaGrass");
MeshRenderer mr = mobj.AddComponent <MeshRenderer>();
mr.sharedMaterial = Resources.Load("meshgrass") as Material;
mr.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
mr.sharedMaterial.SetFloat("_StepOffset", AreaGrassObject.Instance.step + 0.03f);
MeshFilter mf = mobj.AddComponent <MeshFilter>();
mf.sharedMesh = grassMesh;
return(true);
}