Game Engine

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MTV3D65;

namespace gefx
{
   public  class EXDecals
    {
       ArrayList arLand = new ArrayList();



       public struct DecalStruct
       {

           public TVMesh decal;
           public string WhoCreate;
           public float Time;
           public float CTime;
       };

       public List<DecalStruct> DecalList = new List<DecalStruct>();
       public TVMathLibrary Math;
       public float GetLandscapeAltitude(float fx, float fz,TVLandscape Land)
       {
           //TV_COLLISIONRESULT eCollision = new TV_COLLISIONRESULT();
           TVCollisionResult eCollision = new TVCollisionResult();

           TV_3DVECTOR vStart = new TV_3DVECTOR(fx, 1024, fz);
           TV_3DVECTOR vEnd = new TV_3DVECTOR(fx, -10, fz);

           //int nHits = 1;

           TVLandscape lnd = Land;

           //Scene.AdvancedCollision(vStart, vEnd, ref eCollision, (int)MTV3D65.CONST_TV_OBJECT_TYPE.TV_OBJECT_ALL, MTV3D65.CONST_TV_TESTTYPE.TV_TESTTYPE_ACCURATETESTING, ref nHits);
           eCollision = lnd.AdvancedCollide(vStart, vEnd);
           //lnd.Destroy();

           if (eCollision.IsCollision())
               return eCollision.GetCollisionImpact().y;
           else
               return 0;
       }
       public TV_3DVECTOR GetLandscapeNormal(Single nx, Single nz,TVLandscape Land)
       {
           TVLandscape lnd = Land;
           return lnd.GetNormal(nx, nz);
       }
       public TV_3DVECTOR GetNormal(Single fx, Single fz,TVLandscape Land)
       {
           //TV_COLLISIONRESULT eCollision = new TV_COLLISIONRESULT();
           TV_3DVECTOR vNormal = new TV_3DVECTOR();
           Math = new TVMathLibrary();
           //TV_3DVECTOR vStart = new TV_3DVECTOR(fx, 1024, fz);
           //TV_3DVECTOR vEnd = new TV_3DVECTOR(fx, -10, fz);

           //int nHits = 1;
           //Scene.AdvancedCollision(vStart, vEnd, ref eCollision, (int)MTV3D65.CONST_TV_OBJECT_TYPE.TV_OBJECT_ALL, MTV3D65.CONST_TV_TESTTYPE.TV_TESTTYPE_ACCURATETESTING,ref nHits);

           //if (eCollision.bHasCollided)
           //{
           //if (eCollision.eCollidedObjectType == CONST_TV_OBJECT_TYPE.TV_OBJECT_LANDSCAPE)
           vNormal = GetLandscapeNormal(fx, fz, Land);
           //else
           //  vNormal = eCollision.vCollisionNormal;

           //}

           return Math.VNormalize(vNormal);
       }

       public void AlignAndDrop(ref TVMesh mesh, TVLandscape Land)
       {
           mesh.SetCollisionEnable(false);

           TV_3DVECTOR vPosition = mesh.GetPosition();
           TV_3DMATRIX mModel = mesh.GetRotationMatrix();

           //vPosition.y = GetAltitude(vPosition.x, vPosition.z);
           vPosition.y = GetLandscapeAltitude(vPosition.x, vPosition.z, Land);

           mesh.SetPosition(vPosition.x, vPosition.y + 0.01f, vPosition.z);

           TV_3DVECTOR vUp = GetNormal(vPosition.x, vPosition.z,Land );

           TV_3DVECTOR fForward = new TV_3DVECTOR(mModel.m31, mModel.m32, mModel.m33);

           TV_3DVECTOR vRight = Math.VCrossProduct(vUp, fForward);
           TV_3DVECTOR vFront = Math.VCrossProduct(vRight, vUp);
           vRight = Math.VNormalize(vRight);
           vFront = Math.VNormalize(vFront);

           mModel.m11 = vRight.x;
           mModel.m12 = vRight.y;
           mModel.m13 = vRight.z;
           mModel.m21 = vUp.x;
           mModel.m22 = vUp.y;
           mModel.m23 = vUp.z;
           mModel.m31 = vFront.x;
           mModel.m32 = vFront.y;
           mModel.m33 = vFront.z;

           TV_3DMATRIX MatRot = new TV_3DMATRIX();
           Math.TVMatrixRotationX(ref MatRot, 90);
           Math.TVMatrixMultiply(ref mModel, MatRot, mModel);
           mesh.SetRotationMatrix(mModel);

           mesh.SetCollisionEnable(true);
       }

       public void AddDecalTexture(string TPath, ref gefxs _core)
       {


           TVTextureFactory TF = new TVTextureFactory();

           //decaltex = _core.Tex.LoadTexture(TPath);

           decaltex = _core.Tex.LoadTexture(TPath, "texture", 10, 10, CONST_TV_COLORKEY.TV_COLORKEY_NO , true);

       }
       int decaltex;
       public void CreateDecal( TV_3DVECTOR position, TV_3DVECTOR normal, ref gefxs _core,float LiveTime,TVEngine TV)
       {
           TVMesh decal;



           decal = _core.Scene.CreateBillboard(decaltex, position.x, position.y + 0.01f, position.z, 1f, 1f, "Decal1", true);
           decal.SetBillboardType(CONST_TV_BILLBOARDTYPE.TV_BILLBOARD_NOROTATION);
           AlignAndDrop(ref decal, _core.Teren.Land );
           //decal.SetRotation(90, 0, 0);
           DecalStruct s = new DecalStruct();
           s.decal = decal;
           s.Time = LiveTime;
           s.CTime = TV.TimeElapsed();

           DecalList.Add(s);
       }

       public void DrawDecals()
       {

           foreach (DecalStruct m in DecalList)
           {

               m.decal.Render();

           }


       }

       public void RemoveDecals(TVEngine TV)
       {


           int idx=1;

           foreach (DecalStruct d in DecalList)
           {

               if (  (TV.TimeElapsed() - d.CTime ) > d.Time )
               {
                   d.decal.Destroy();
                   
                  

               }

           }

           //if (DecalList.Count > 0)
           //{

           //    DecalList.RemoveAt(idx);
           //}

       }



    }
}