コード例 #1
0
 public void on_operation_changed(object o, EventArgs e)
 {
     LogFile.GetInstance().WriteLine("on_operation_changed >>> ");
     if (!settingtexturestagecomboentry)
     {
         MapTextureStage maptexturestage = GetSelectedMapTextureStage();
         if (maptexturestage != null)
         {
             if (operationcombo.Entry.Text != "")
             {
                 MapTextureStage.OperationType operation = MapTextureStage.OperationType.NoTexture;
                 if (operationcombo.Entry.Text == "Blend")
                 {
                     operation = MapTextureStage.OperationType.Blend;
                 }
                 else if (operationcombo.Entry.Text == "Replace")
                 {
                     operation = MapTextureStage.OperationType.Replace;
                 }
                 else if (operationcombo.Entry.Text == "Nop")
                 {
                     operation = MapTextureStage.OperationType.Nop;
                 }
                 else if (operationcombo.Entry.Text == "NoTexture")
                 {
                     operation = MapTextureStage.OperationType.NoTexture;
                 }
                 maptexturestage.Operation = operation;
                 terrain.OnTerrainModified();
             }
         }
     }
     LogFile.GetInstance().WriteLine("on_operation_changed <<<");
 }
コード例 #2
0
 public RendererTextureStage(MapTextureStage maptexturestage, int maptexturestagepass, bool UsingMultipass, int mapwidth, int mapheight)
 {
     this.maptexturestage     = maptexturestage;
     this.maptexturestagepass = maptexturestagepass;
     this.mapwidth            = mapwidth;
     this.mapheight           = mapheight;
     this.UsingMultipass      = UsingMultipass;
 }
コード例 #3
0
 public RendererTextureStage(MapTextureStage maptexturestage, int maptexturestagepass, bool UsingMultipass, int mapwidth, int mapheight)
 {
     this.maptexturestage = maptexturestage;
     this.maptexturestagepass = maptexturestagepass;
     this.mapwidth = mapwidth;
     this.mapheight = mapheight;
     this.UsingMultipass = UsingMultipass;
 }
コード例 #4
0
 // in-place blendmaptexture editing
 public void OnBlendMapInPlaceEdited(MapTextureStage maptexturestage, int xleft, int ytop, int xright, int ybottom)   // probably could be a little more specific...
 {
     //renderableheightmap.MapTexturesModified(Math.Max(0, xleft), Math.Max(0, ytop), Math.Min(HeightMapWidth - 1, xright), Math.Min(HeightMapHeight - 1, ybottom));
     if (BlendmapInPlaceEdited != null)
     {
         BlendmapInPlaceEdited(maptexturestage, Math.Max(0, xleft), Math.Max(0, ytop), Math.Min(HeightMapWidth - 2, xright), Math.Min(HeightMapHeight - 2, ybottom));
     }
 }
コード例 #5
0
        void on_btnLoadBlendTexture_clicked(object o, EventArgs e)
        {
            string filepath = GetFilePath("Load blend texture", "*.JPG");

            if (filepath != "")
            {
                MapTextureStage maptexturestage = GetSelectedMapTextureStage();
                maptexturestage.blendtexture.LoadFromFile(filepath);
                terrain.OnTerrainModified();
            }
        }
コード例 #6
0
        void on_btnSaveAsBlendTexture_clicked(object o, EventArgs e)
        {
            string filepath = GetFilePath("Save blend texture as", "*.JPG");

            if (filepath != "")
            {
                MapTextureStage maptexturestage = GetSelectedMapTextureStage();
                maptexturestage.blendtexture.SaveAlphaToFile(filepath);
                blendtexturefilename.Text = filepath;
            }
        }
コード例 #7
0
 void on_tilesizescale_value_changed(object o, EventArgs e)
 {
     if (!settingtexturestagecomboentry)
     {
         MapTextureStage maptexturestage = GetSelectedMapTextureStage();
         if (maptexturestage != null)
         {
             LogFile.GetInstance().WriteLine("changing tilesize to " + (int)tilesizescale.Value);
             maptexturestage.Tilesize = (int)tilesizescale.Value;
         }
     }
 }
コード例 #8
0
 void on_btnSaveBlendTexture_clicked(object o, EventArgs e)
 {
     if (blendtexturefilename.Text == "")
     {
         on_btnSaveAsBlendTexture_clicked(o, e);
     }
     else
     {
         MapTextureStage maptexturestage = GetSelectedMapTextureStage();
         maptexturestage.blendtexture.SaveAlphaToFile(blendtexturefilename.Text);
     }
 }
コード例 #9
0
 MapTextureStage GetSelectedMapTextureStage()
 {
     try
     {
         MapTextureStage maptexturestage = terrain.texturestages[GetSelectedMapTextureStageIndex()];
         return(maptexturestage);
     }
     catch (Exception)
     {
         //Console.WriteLine(e);
         return(null);
     }
 }
コード例 #10
0
 void on_btnRemoveStage_clicked(object o, EventArgs e)
 {
     if (terrain.texturestages.Count > 1)
     {
         MapTextureStage maptexturestage = GetSelectedMapTextureStage();
         if (maptexturestage != null)
         {
             Terrain.GetInstance().texturestages.Remove(maptexturestage);
             terrain.OnTerrainModified();
         }
     }
     else
     {
         InfoMessage("You need at least one texture stage for the map to run");
     }
 }
コード例 #11
0
        void on_texturestage_changed(object o, EventArgs e)
        {
            LogFile.GetInstance().WriteLine("on_texturestage_changed() >>>");
            MapTextureStage maptexturestage = GetSelectedMapTextureStage();

            if (maptexturestage != null)
            {
                texturefilenamelbl.Text   = maptexturestage.SplatTextureFilename;
                blendtexturefilename.Text = maptexturestage.BlendTextureFilename;
                operationcombo.Entry.Text = maptexturestage.Operation.ToString();
                (BrushEffectController.GetInstance()
                 .brusheffects[typeof(PaintTexture)] as PaintTexture)
                .SetCurrentEditTexture(maptexturestage);
                tilesizescale.Value = maptexturestage.Tilesize;
            }
            LogFile.GetInstance().WriteLine("on_texturestage_changed() <<<");
        }
コード例 #12
0
        void terrain_BlendmapInPlaceEdited(MapTextureStage maptexturestage, int xleft, int ytop, int xright, int ybottom)
        {
            for (int chunkx = xleft / chunksize; chunkx <= xright / chunksize && chunkx < width / chunksize;
                 chunkx++)
            {
                for (int chunky = ytop / chunksize; chunky <= ybottom / chunksize && chunky < height / chunksize;
                     chunky++)
                {
                    //    Console.WriteLine("chunk " + chunkx + " " + chunky);
                    //for (int texturestageindex = 0; texturestageindex < maptexturestages.GetLength(0); texturestageindex++)
                    //{
//                        maptexturestage = maptexturestages[texturestageindex];
                    if (maptexturestage.Operation == MapTextureStage.OperationType.Blend)
                    {
                        bool texturestageused = false;
                        // go through each point in chunk and check if texturestage is used
                        for (int mapx = chunkx * chunksize; mapx < (chunkx + 1) * chunksize && !texturestageused;
                             mapx++)
                        {
                            for (int mapy = chunky * chunksize; mapy < (chunky + 1) * chunksize && !texturestageused;
                                 mapy++)
                            {
                                //if (mapx < width && mapy < height)
                                //{
                                if (maptexturestage.Affects(mapx, mapy, width, height))
                                {
                                    texturestageused = true;
                                }
                                //}
                            }
                        }
                        chunkusestexturestage[maptexturestage][chunkx, chunky] = texturestageused;
                        //  if (chunkusestexturestage[texturestageindex][chunkx, chunky])
                        //{
                        //  Console.WriteLine("texturestage used: " + texturestageindex + " " + chunkx + " " + chunky);
                        //}
                    }
                    else
                    {
                        chunkusestexturestage[maptexturestage][chunkx, chunky] = true;
                    }
                    //}
                }
            }
        }
コード例 #13
0
 void LoadTextureData(MapTextureStage maptexturestage)
 {
     thistexture = maptexturestage.blendtexture;
     if (thistexture != null)
     {
         texturewidth  = thistexture.Width;
         textureheight = thistexture.Height;
         LogFile.GetInstance().WriteLine("edittexture width " + texturewidth + " height " + textureheight);
         alphadata = new double[texturewidth, textureheight];
         for (int x = 0; x < texturewidth; x++)
         {
             for (int y = 0; y < textureheight; y++)
             {
                 alphadata[x, y] = thistexture.AlphaData[x, y];
             }
         }
     }
 }
コード例 #14
0
        // note to self: move this to subscriber?
        void DrawMinimap()
        {
            Terrain terrain = Terrain.GetInstance();

            if (DateTime.Now.Subtract(LastMinimapUpdate).TotalMilliseconds > 1000)
            //if( true )
            {
                List <RendererPass> rendererpasses = new List <RendererPass>();
                bool multipass = true; // force multipass for now for simplicity
                int  maxtexels = RendererSdl.GetInstance().MaxTexelUnits;
                if (multipass)
                {
                    for (int i = 0; i < terrain.texturestages.Count; i++)
                    {
                        MapTextureStage maptexturestage          = terrain.texturestages[i];
                        int             numtexturestagesrequired = maptexturestage.NumTextureStagesRequired;
                        if (numtexturestagesrequired > 0) // exclude Nops
                        {
                            RendererPass rendererpass = new RendererPass(maxtexels);
                            for (int j = 0; j < maptexturestage.NumTextureStagesRequired; j++)
                            {
                                rendererpass.AddStage(new RendererTextureStage(maptexturestage, j, true, mapwidth * Terrain.SquareSize, mapheight * Terrain.SquareSize));
                            }
                            rendererpasses.Add(rendererpass);
                        }
                    }
                }

                GraphicsHelperGl g = new GraphicsHelperGl();

                //g.ApplyOrtho(windowwidth, windowheight, RendererSdl.GetInstance().OuterWindowWidth, RendererSdl.GetInstance().OuterWindowHeight);

                g.EnableBlendSrcAlpha();
                Gl.glDepthFunc(Gl.GL_LEQUAL);

                int chunkwidth  = minimapwidth / numchunks;
                int chunkheight = minimapheight / numchunks;

                float[] ambientLight  = new float[] { 0.4f, 0.4f, 0.4f, 1.0f };
                float[] diffuseLight  = new float[] { 0.6f, 0.6f, 0.6f, 1.0f };
                float[] specularLight = new float[] { 0.2f, 0.2f, 0.2f, 1.0f };
                float[] position      = new float[] { -1.0f, 0.2f, -0.4f, 1.0f };

                Gl.glLightfv(Gl.GL_LIGHT0, Gl.GL_AMBIENT, ambientLight);
                Gl.glLightfv(Gl.GL_LIGHT0, Gl.GL_DIFFUSE, diffuseLight);
                Gl.glLightfv(Gl.GL_LIGHT0, Gl.GL_SPECULAR, specularLight);
                Gl.glLightfv(Gl.GL_LIGHT0, Gl.GL_POSITION, position);

                foreach (RendererPass rendererpass in rendererpasses)
                {
                    rendererpass.Apply();

                    for (int x = 0; x + chunkwidth < minimapwidth; x += chunkwidth)
                    {
                        for (int y = 0; y + chunkheight < minimapheight; y += chunkheight)
                        {
                            Gl.glBegin(Gl.GL_QUADS);

                            //double ul = 0;
                            //double ur = mapwidth * Terrain.SquareSize;
                            //double vt = 0;
                            //double vb = mapheight * Terrain.SquareSize;
                            double ul = (double)x / minimapwidth * mapwidth * Terrain.SquareSize;
                            double ur = (double)(x + chunkwidth) / minimapwidth * mapwidth * Terrain.SquareSize;
                            double vt = (double)y / minimapheight * mapheight * Terrain.SquareSize;
                            double vb = (double)(y + chunkheight) / minimapheight * mapheight * Terrain.SquareSize;

                            double xl = minimapx + x;
                            double xr = minimapx + x + minimapwidth / (double)numchunks;
                            double yt = minimapy + y;
                            double yb = minimapy + y + minimapheight / (double)numchunks;

                            Gl.glTexCoord2d(ul, vt);
                            Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ul, vt);
                            g.Normal(renderableheightmap.GetNormal(x * mapwidth / minimapwidth, y * mapheight / minimapheight));
                            //g.Normal(renderableheightmap.normalsperquad[, ]);
                            Gl.glVertex2d(xl, yt);

                            Gl.glTexCoord2d(ul, vb);
                            Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ul, vb);
                            g.Normal(renderableheightmap.GetNormal(x * mapwidth / minimapwidth, (y + chunkheight) * mapheight / minimapheight));
                            //g.Normal( renderableheightmap.normalsperquad[x * mapwidth / minimapwidth, (y + 1) * mapheight / minimapheight ] );
                            Gl.glVertex2d(xl, yb);

                            Gl.glTexCoord2d(ur, vb);
                            Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ur, vb);
                            g.Normal(renderableheightmap.GetNormal((x + chunkwidth) * mapwidth / minimapwidth, (y + chunkheight) * mapheight / minimapheight));
                            //g.Normal(renderableheightmap.normalsperquad[(x + 1) * mapwidth / minimapwidth, (y + 1) * mapheight / minimapheight]);
                            Gl.glVertex2d(xr, yb);

                            Gl.glTexCoord2d(ur, vt);
                            Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ur, vt);
                            g.Normal(renderableheightmap.GetNormal((x + chunkwidth) * mapwidth / minimapwidth, y * mapheight / minimapheight));
                            //g.Normal(renderableheightmap.normalsperquad[(x + 1) * mapwidth / minimapwidth, y * mapheight / minimapheight]);
                            Gl.glVertex2d(xr, yt);

                            Gl.glEnd();
                        }
                    }
                }

                g.ActiveTexture(0);
                Gl.glBindTexture(Gl.GL_TEXTURE_2D, minimaptexture);
                Gl.glCopyTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, minimapx,
                                    RendererSdl.GetInstance().InnerWindowHeight - minimapy - minimapsize,
                                    minimapsize, minimapsize, 0);
                Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_NEAREST);
                LastMinimapUpdate = DateTime.Now;

//                g.RemoveOrtho();

                g.ActiveTexture(1);
                g.DisableTexture2d();
                g.SetTextureScale(1);
                g.ActiveTexture(0);
                g.SetTextureScale(1);

                g.EnableModulate();

                Gl.glDisable(Gl.GL_BLEND);
            }
            else
            {
                GraphicsHelperGl g = new GraphicsHelperGl();

                //Gl.glMatrixMode(Gl.GL_PROJECTION);
                //Gl.glPushMatrix();
                //Gl.glLoadIdentity();
                //Gl.glOrtho(0, windowwidth, windowheight - RendererSdl.GetInstance().OuterWindowHeight, 0, -1, 1); // we'll just draw the minimap directly onto our display
                //Gl.glOrtho(0, windowwidth, windowheight, windowheight - RendererSdl.GetInstance().OuterWindowHeight, -1, 1); // we'll just draw the minimap directly onto our display

                //Gl.glMatrixMode(Gl.GL_MODELVIEW);
                //Gl.glPushMatrix();
                //Gl.glLoadIdentity();

                g.ActiveTexture(0);
                g.EnableTexture2d();
                Gl.glBindTexture(Gl.GL_TEXTURE_2D, minimaptexture);
                //Gl.glBindTexture(Gl.GL_TEXTURE_2D, (terrain.texturestages[0].texture as GlTexture).GlReference);
                Gl.glDisable(Gl.GL_LIGHTING);
                Gl.glBegin(Gl.GL_QUADS);

                Gl.glTexCoord2d(0, 1);
                Gl.glVertex2i(minimapx, minimapy);

                Gl.glTexCoord2d(0, 1 - minimapwidth / (double)minimapsize);
                Gl.glVertex2i(minimapx, minimapy + minimapheight);

                Gl.glTexCoord2d(minimapwidth / (double)minimapsize, 1 - minimapheight / (double)minimapsize);
                Gl.glVertex2i(minimapx + minimapwidth, minimapy + minimapheight);

                Gl.glTexCoord2d(minimapwidth / (double)minimapsize, 1);
                Gl.glVertex2i(minimapx + minimapwidth, minimapy);

                Gl.glEnd();

                Gl.glEnable(Gl.GL_LIGHTING);

                //Gl.glMatrixMode(Gl.GL_PROJECTION);
                //Gl.glPopMatrix();
                //Gl.glMatrixMode(Gl.GL_MODELVIEW);
                //Gl.glPopMatrix();
            }
        }
コード例 #15
0
 public void SetCurrentEditTexture(MapTextureStage maptexturestage)
 {
     this.maptexturestage = maptexturestage;
     LoadTextureData(maptexturestage);
 }
コード例 #16
0
        // what we need to do is to render the splatted texture in ortho mode with lighting off
        // or normals off (to be tested)
        // then to export the generated bitmap
        // viewport should be set to heightmapwidth x heightmapheight
        public void Export(string filepath)
        {
            Terrain terrain       = Terrain.GetInstance();
            int     picturewidth  = terrain.MapWidth * Terrain.SquareSize;
            int     pictureheight = terrain.MapHeight * Terrain.SquareSize;

            LogFile.GetInstance().WriteLine("Export to " + filepath + " picturewidth " + picturewidth + " pictureheight: " + pictureheight);
            //int windowwidth = RendererSdl.GetInstance().WindowWidth;
            //int windowheight = RendererSdl.GetInstance().WindowHeight;
            int windowwidth  = 256;
            int windowheight = 256;

            Gl.glViewport(0, 0, windowwidth, windowheight);

            byte[] buffer = new byte[windowwidth * windowheight * 4];
            //System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap( picturewidth, pictureheight );
            //byte[] imagedata = new byte[picturewidth * pictureheight * 4];
            Image image = new Image(picturewidth, pictureheight);

            List <RendererPass> rendererpasses = new List <RendererPass>();
            bool multipass = true; // force multipass for now for simplicity
            int  maxtexels = RendererSdl.GetInstance().MaxTexelUnits;

            if (multipass)
            {
                for (int i = 0; i < terrain.texturestages.Count; i++)
                {
                    MapTextureStage maptexturestage          = terrain.texturestages[i];
                    int             numtexturestagesrequired = maptexturestage.NumTextureStagesRequired;
                    if (numtexturestagesrequired > 0) // exclude Nops
                    {
                        RendererPass rendererpass = new RendererPass(maxtexels);
                        for (int j = 0; j < maptexturestage.NumTextureStagesRequired; j++)
                        {
                            rendererpass.AddStage(new RendererTextureStage(maptexturestage, j, true, picturewidth, pictureheight));
                        }
                        rendererpasses.Add(rendererpass);
                    }
                }
            }

            GraphicsHelperGl g = new GraphicsHelperGl();

            Gl.glMatrixMode(Gl.GL_PROJECTION);
            Gl.glPushMatrix();
            Gl.glLoadIdentity();
            Gl.glOrtho(0, windowwidth, windowheight, 0, -1, 1);

            Gl.glMatrixMode(Gl.GL_MODELVIEW);
            Gl.glPushMatrix();
            Gl.glLoadIdentity();

            Gl.glDisable(Gl.GL_CULL_FACE);
            Gl.glDisable(Gl.GL_LIGHTING);

            g.EnableBlendSrcAlpha();
            Gl.glDepthFunc(Gl.GL_LEQUAL);

            for (int chunkx = 0; chunkx < Math.Ceiling((double)picturewidth / windowwidth); chunkx++)
            {
                for (int chunky = 0; chunky < Math.Ceiling((double)pictureheight / windowheight); chunky++)
                {
                    Console.WriteLine("chunkx " + chunkx + " chunky " + chunky);

                    Gl.glClear(Gl.GL_COLOR_BUFFER_BIT | Gl.GL_DEPTH_BUFFER_BIT);                // Clear The Screen And Depth Buffer

                    foreach (RendererPass rendererpass in rendererpasses)
                    {
                        rendererpass.Apply();

                        Gl.glBegin(Gl.GL_QUADS);

                        double ul = (chunkx * windowwidth);
                        double ur = (chunkx * windowwidth + windowwidth);
                        double vt = (chunky * windowheight);
                        double vb = (chunky * windowheight + windowheight);
                        Gl.glTexCoord2d(ul, vt);
                        Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ul, vt);
                        Gl.glVertex2i(0, 0);

                        Gl.glTexCoord2d(ul, vb);
                        Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ul, vb);
                        Gl.glVertex2i(0, windowheight);

                        Gl.glTexCoord2d(ur, vb);
                        Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ur, vb);
                        Gl.glVertex2i(windowwidth, windowheight);

                        Gl.glTexCoord2d(ur, vt);
                        Gl.glMultiTexCoord2dARB(Gl.GL_TEXTURE1_ARB, ur, vt);
                        Gl.glVertex2i(windowwidth, 0);

                        Gl.glEnd();
                    }

                    IntPtr ptr = Marshal.AllocHGlobal(windowwidth * windowheight * 4);
                    Gl.glReadPixels(0, 0, windowwidth, windowheight, Gl.GL_RGBA, Gl.GL_UNSIGNED_BYTE, ptr);
                    Marshal.Copy(ptr, buffer, 0, windowwidth * windowheight * 4);
                    Marshal.FreeHGlobal(ptr);

                    for (int x = 0; x < windowwidth; x++)
                    {
                        for (int y = 0; y < windowheight; y++)
                        {
                            if ((chunky * windowheight + y < pictureheight) &&
                                (chunkx * windowwidth + x < picturewidth))
                            {
                                int pixeloffset = (windowheight - y - 1) * windowwidth * 4 + x * 4;
                                //bitmap.SetPixel(x + chunkx * windowwidth, y + chunky * windowheight, System.Drawing.Color.FromArgb(buffer[pixeloffset + 0],
                                //buffer[pixeloffset + 1], buffer[pixeloffset + 2]));
                                image.SetPixel(x + chunkx * windowwidth, y + chunky * windowheight,
                                               buffer[pixeloffset + 0],
                                               buffer[pixeloffset + 1],
                                               buffer[pixeloffset + 2],
                                               255
                                               );
                            }
                        }
                    }
                }
            }
            if (File.Exists(filepath))
            {
                File.Delete(filepath);
            }
            image.Save(filepath);
            //DevIL.DevIL.SaveBitmap( filepath, bitmap);

            Gl.glPopMatrix();
            Gl.glMatrixMode(Gl.GL_PROJECTION);
            Gl.glPopMatrix();
            Gl.glMatrixMode(Gl.GL_MODELVIEW);

            Gl.glEnable(Gl.GL_LIGHTING);

            g.ActiveTexture(1);
            g.DisableTexture2d();
            g.SetTextureScale(1);
            g.ActiveTexture(0);
            g.SetTextureScale(1);

            Gl.glEnable(Gl.GL_CULL_FACE);
            Gl.glEnable(Gl.GL_LIGHTING);
            Gl.glDisable(Gl.GL_BLEND);

            g.EnableModulate();

            Gl.glViewport(0, 0, RendererSdl.GetInstance().OuterWindowWidth, RendererSdl.GetInstance().OuterWindowHeight);
            g.CheckError();

            MainUI.GetInstance().uiwindow.InfoMessage("Exported blended terrain texture to " + filepath);
        }
コード例 #17
0
        // determine which chunks are used by each texture stage
        // only affects blend really
        void CacheChunkTextureStageUsage()
        {
            int numxchunks = width / chunksize;
            int numychunks = height / chunksize;

            chunkusestexturestage = new Dictionary <MapTextureStage, bool[, ]>();
            foreach (MapTextureStage maptexturestage in maptexturestages)
            {
                chunkusestexturestage.Add(maptexturestage, new bool[numxchunks, numychunks]);
            }
            for (int chunkx = 0; chunkx < numxchunks; chunkx++)
            {
                for (int chunky = 0; chunky < numychunks; chunky++)
                {
                    //    Console.WriteLine("chunk " + chunkx + " " + chunky);
                    for (int texturestageindex = 0; texturestageindex < maptexturestages.Count; texturestageindex++)
                    {
                        MapTextureStage texturestage = maptexturestages[texturestageindex];
                        //Console.WriteLine("texturestage " + texturestageindex + " " + texturestage.Operation );
                        if (texturestage.Operation == MapTextureStage.OperationType.Blend)
                        {
                            bool texturestageused = false;
                            // go through each point in chunk and check if texturestage is used
                            for (int mapx = chunkx * chunksize; mapx < (chunkx + 1) * chunksize && !texturestageused;
                                 mapx++)
                            {
                                for (int mapy = chunky * chunksize; mapy < (chunky + 1) * chunksize && !texturestageused;
                                     mapy++)
                                {
                                    if (texturestage.Affects(mapx, mapy, width, height))
                                    {
                                        texturestageused = true;
                                    }
                                }
                            }
                            chunkusestexturestage[texturestage][chunkx, chunky] = texturestageused;
                            //  if (chunkusestexturestage[texturestageindex][chunkx, chunky])
                            //{
                            //  Console.WriteLine("texturestage used: " + texturestageindex + " " + chunkx + " " + chunky);
                            //}
                        }
                        else if (texturestage.Operation == MapTextureStage.OperationType.Nop)
                        {
                            chunkusestexturestage[texturestage][chunkx, chunky] = false;
                        }
                        else
                        {
                            //Console.WriteLine("RenderableHeightMap,, cache chunk usage, true");
                            chunkusestexturestage[texturestage][chunkx, chunky] = true;
                        }
                    }
                }
            }
            maxtexels = RendererSdl.GetInstance().MaxTexelUnits;

            int totaltexturestagesneeded = 0;

            foreach (MapTextureStage maptexturestage in maptexturestages)
            {
                totaltexturestagesneeded += maptexturestage.NumTextureStagesRequired;
            }

            multipass = false;
            if (totaltexturestagesneeded > maxtexels)
            {
                multipass = true;
            }
            rendererpasses = new List <RendererPass>();
            //maxtexels = 2;
            //int currenttexel = 0;

            multipass = true; // force multipass for now for simplicity
            if (multipass)
            {
                for (int i = 0; i < maptexturestages.Count; i++)
                {
                    MapTextureStage maptexturestage          = maptexturestages[i];
                    int             numtexturestagesrequired = maptexturestage.NumTextureStagesRequired;
                    if (numtexturestagesrequired > 0) // exclude Nops
                    {
                        RendererPass rendererpass = new RendererPass(maxtexels);
                        for (int j = 0; j < maptexturestage.NumTextureStagesRequired; j++)
                        {
                            rendererpass.AddStage(new RendererTextureStage(maptexturestage, j, true, width, height));
                        }
                        rendererpasses.Add(rendererpass);
                    }
                }
            }
        }