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Licensed under Apache 2.0 * * Available at http://www.apache.org/licenses/LICENSE-2.0.html * \******************************************************************************/ using UnityEngine; using System.Collections; public class StemMesh : MonoBehaviour { const int TRIANGLE_INDICES_PER_QUAD = 6; const int VERTICES_PER_QUAD = 4; public Collider[] segments; public int sides = 4; public AnimationCurve stemCurve; public float growthProgress = 0.0f; public float stumpDiminishTime = 2.0f; private Vector3[] vertices_; private bool[] broken; private float stump_width_ = 1.0f; private bool is_diminishing_ = false; void Start () { broken = new bool[segments.Length]; for (int i = 0; i < broken.Length; ++i) broken[i] = false; MeshFilter filter = GetComponent(); filter.mesh = new Mesh(); InitMesh(); filter.mesh.RecalculateBounds(); filter.mesh.RecalculateNormals(); } void Update () { UpdateMesh(); MeshFilter filter = GetComponent(); filter.mesh.MarkDynamic(); filter.mesh.vertices = vertices_; filter.mesh.RecalculateBounds(); filter.mesh.RecalculateNormals(); } public bool IsBroken() { if (broken == null) return false; for (int i = 0; i < broken.Length; ++i) { if (broken[i]) return true; } return false; } public bool IsStumpClear() { return stump_width_ == 0.0f; } public void RemoveStump() { is_diminishing_ = true; } private void InitMesh() { Mesh mesh = GetComponent().mesh; int num_vertices = sides * segments.Length; vertices_ = new Vector3[num_vertices]; Vector2[] uv = new Vector2[num_vertices]; int[] triangles = new int[TRIANGLE_INDICES_PER_QUAD * (num_vertices - sides)]; for (int v = 0; v < num_vertices; ++v) { vertices_[v] = new Vector3(0, 0, 0); uv[v] = new Vector3(0, 0, 0); } int vertex_index = 0; for (int seg = 0; seg < segments.Length - 1; ++seg) { if (segments[seg + 1].GetComponent() == null) { for (int i = 0; i < sides * TRIANGLE_INDICES_PER_QUAD; ++i) triangles[vertex_index++] = 0; } else { for (int side = 0; side < sides; ++side) { int next_side = (side + 1) % sides; triangles[vertex_index++] = sides * seg + side; triangles[vertex_index++] = sides * seg + next_side; triangles[vertex_index++] = sides * (seg + 1) + next_side; triangles[vertex_index++] = sides * seg + side; triangles[vertex_index++] = sides * (seg + 1) + next_side; triangles[vertex_index++] = sides * (seg + 1) + side; } } } mesh.vertices = vertices_; mesh.uv = uv; mesh.triangles = triangles; } protected void Separate(int index) { for (int i = 0; i < index; ++i) segments[i] = null; } private void Break(int index) { for (int i = index; i < segments.Length; ++i) { segments[i] = null; } } private void KillStump() { for (int i = 0; i < broken.Length && !broken[i]; ++i) segments[i].GetComponent().enabled = false; } private void UpdateMesh() { if (is_diminishing_ && stump_width_ != 0.0f) { stump_width_ -= Time.deltaTime / stumpDiminishTime; stump_width_ = Mathf.Clamp(stump_width_, 0.0f, 1.0f); if (stump_width_ == 0.0f) KillStump(); } for (int i = 0; i < segments.Length; ++i) { if (!broken[i] && segments[i].GetComponent() == null) { InitMesh(); broken[i] = true; } } int vertex_index = 0; float angle = 360.0f / sides; bool is_stump = true; for (int i = 0; i < segments.Length; ++i) { float phase = (1.0f * i) / (segments.Length - 1); float width = Mathf.Clamp(segments.Length * growthProgress - i, 0.0f, 1.0f); is_stump = is_stump && !broken[i]; if (is_stump) width *= stump_width_; Vector3 offset = new Vector3(width * stemCurve.Evaluate(phase), 0, 0); for (int side = 0; side < sides; ++side) { vertices_[vertex_index++] = transform.InverseTransformPoint(segments[i].transform.TransformPoint(offset)); offset = Quaternion.AngleAxis(angle, Vector3.up) * offset; } } } } StemMeshAssembly-CSharp.dll