示例#1
0
        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            m_SpriteBatch = new SpriteBatch(GraphicsDevice);

            m_RayCaster = new RayCaster(m_Graphics.GraphicsDevice, RayCastRenderWidth, RayCastRenderHeight);

            m_Font1 = Content.Load <SpriteFont>("Courier New");

            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load <Texture2D>("Textures/242")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load <Texture2D>("Textures/244")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load <Texture2D>("Textures/241")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load <Texture2D>("Textures/203")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load <Texture2D>("Textures/245")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load <Texture2D>("Textures/233")));

            m_RayCasterCamera = new RayCasterCamera();
            m_RayCasterMap    = new RayCasterMap();
        }
示例#2
0
        public Texture2D Render(RayCasterCamera rayCasterCamera, RayCasterMap rayCasterMap)
        {
            // Based on the raycaster tutorial at
            // http://www.student.kuleuven.be/~m0216922/CG/raycasting.html

            // Clear the screen
            for (int i = 0; i < m_ScreenWidth * m_ScreenHeight; i++)
                m_Data[i] = 0;

            // For each horizontal pixel
            for(int x=0;x<m_ScreenWidth;x++)
            {
                double cameraX = 2 * x / (double)(m_ScreenWidth) - 1; //x-coordinate in RayCasterCamera space
                double rayPosX = rayCasterCamera.Position.X;
                double rayPosY = rayCasterCamera.Position.Y;
                double rayDirX = rayCasterCamera.Direction.X + rayCasterCamera.VectorPlane.X * cameraX;
                double rayDirY = rayCasterCamera.Direction.Y + rayCasterCamera.VectorPlane.Y * cameraX;

               //which box of the RayCasterMap we're in
                int mapX = (int)(rayPosX);
                int mapY = (int)(rayPosY);

                //length of ray from current position to next x or y-side
                double sideDistX;
                double sideDistY;

                //length of ray from one x or y-side to next x or y-side
                double deltaDistX = Math.Sqrt(1 + (rayDirY * rayDirY) / (rayDirX * rayDirX));
                double deltaDistY = Math.Sqrt(1 + (rayDirX * rayDirX) / (rayDirY * rayDirY));
                double perpWallDist;

                //what direction to step in x or y-direction (either +1 or -1)
                int stepX;
                int stepY;

                int hit = 0; //was there a wall hit?
                int side = 0; //was a NS or a EW wall hit?

                 //calculate step and initial sideDist
                  if (rayDirX < 0)
                  {
                    stepX = -1;
                    sideDistX = (rayPosX - mapX) * deltaDistX;
                  }
                  else
                  {
                    stepX = 1;
                    sideDistX = (mapX + 1.0 - rayPosX) * deltaDistX;
                  }
                  if (rayDirY < 0)
                  {
                    stepY = -1;
                    sideDistY = (rayPosY - mapY) * deltaDistY;
                  }
                  else
                  {
                    stepY = 1;
                    sideDistY = (mapY + 1.0 - rayPosY) * deltaDistY;
                  }

                //perform DDA
                while (hit == 0)
                {
                    //jump to next RayCasterMap square, OR in x-direction, OR in y-direction
                    if (sideDistX < sideDistY)
                    {
                        sideDistX += deltaDistX;
                        mapX += stepX;
                        side = 0;
                    }
                    else
                    {
                        sideDistY += deltaDistY;
                        mapY += stepY;
                        side = 1;
                    }

                    //Check if ray has hit a wall
                    if (rayCasterMap.WorldMap[mapX,mapY] > 0) hit = 1;
                }

                //Calculate distance projected on RayCasterCamera direction (oblique distance will give fisheye effect!)
                  if (side == 0)
                  perpWallDist = Math.Abs((mapX - rayPosX + (1 - stepX) / 2) / rayDirX);
                  else
                  perpWallDist = Math.Abs((mapY - rayPosY + (1 - stepY) / 2) / rayDirY);

                //Calculate height of line to draw on screen
                  int lineHeight = Math.Abs((int)(m_ScreenHeight / perpWallDist));

                  //calculate lowest and highest pixel to fill in current stripe
                  int drawStart = -lineHeight / 2 + m_ScreenHeight / 2;
                  if(drawStart < 0)
                      drawStart = 0;
                  int drawEnd = lineHeight / 2 + m_ScreenHeight / 2;
                  if (drawEnd >= m_ScreenHeight)
                      drawEnd = m_ScreenHeight - 1;

                //texturing calculations
                  int texNum = rayCasterMap.WorldMap[mapX,mapY] - 1; //1 subtracted from it so that texture 0 can be used!

                  //calculate value of wallX
                  double wallX; //where exactly the wall was hit
                  if (side == 1)
                  {
                      wallX = rayPosX + ((mapY - rayPosY + (1 - stepY) / 2) / rayDirY) * rayDirX;
                  }
                  else
                  {
                      wallX = rayPosY + ((mapX - rayPosX + (1 - stepX) / 2) / rayDirX) * rayDirY;
                  }
                  wallX -= Math.Floor(wallX);

                  //x coordinate on the texture
                  var texX = (int)((wallX) * (double)TextureWidth);
                  if(side == 0 && rayDirX > 0) texX = TextureWidth - texX - 1;
                  if(side == 1 && rayDirY < 0) texX = TextureWidth - texX - 1;

                  m_CurrentTexture = m_TextureLibrary[texNum];

                  int index = x + (m_ScreenWidth * drawStart);
                  for (int y = drawStart; y < drawEnd; y++)
                  {
                      var d = y * 256 - m_ScreenHeight * 128 + lineHeight * 128;
                      var texY = ((d * TextureHeight) / lineHeight) / 256;

                      // Darkness Calculations
                      var dval = (int)(perpWallDist *2);
                      dval = Math.Min(47, dval);
                      var color = m_CurrentTexture.Texture[dval][texX, texY];

                      index += m_ScreenWidth;
                      m_Data[index] = color;
                  }

                // Floor Casting
                  double floorXWall, floorYWall; //x, y position of the floor texel at the bottom of the wall

                  //4 different wall directions possible
                  if(side == 0 && rayDirX > 0)
                  {
                    floorXWall = mapX;
                    floorYWall = mapY + wallX;
                  }
                  else if(side == 0 && rayDirX < 0)
                  {
                    floorXWall = mapX + 1.0;
                    floorYWall = mapY + wallX;
                  }
                  else if(side == 1 && rayDirY > 0)
                  {
                    floorXWall = mapX + wallX;
                    floorYWall = mapY;
                  }
                  else
                  {
                    floorXWall = mapX + wallX;
                    floorYWall = mapY + 1.0;
                  }

                double distWall = perpWallDist;
                  double distPlayer = 0.0;

                  m_FloorTexture = m_TextureLibrary[4];
                  m_CeilingTexture = m_TextureLibrary[4];

                  if (drawEnd < 0)
                      drawEnd = m_ScreenHeight;

                  //Draw the floor from drawEnd to the bottom of the screen
                  for(int y = drawEnd + 1; y < m_ScreenHeight; y++)
                  {
                        double currentDist = m_LookupTableFloorDist[y];

                        double weight = (currentDist - distPlayer) / (distWall - distPlayer);

                        double currentFloorX = weight * floorXWall + (1.0 - weight) * rayCasterCamera.Position.X;
                        double currentFloorY = weight * floorYWall + (1.0 - weight) * rayCasterCamera.Position.Y;

                        const int texWidth = 64;
                        const int texHeight = 64;

                        var floorTexX = (int) (currentFloorX * 64) % texWidth;
                        var floorTexY = (int) (currentFloorY * 64) % texHeight;

                        var dval = (int)(currentDist * 2);
                        dval = Math.Min(47, dval);

                        var floorColor = m_FloorTexture.Texture[dval][floorTexY, floorTexX];
                        var ceilingColor = m_CeilingTexture.Texture[dval][floorTexY, floorTexX];

                        // Write pixel
                        m_Data[m_FIndexLookup[x,y]] = floorColor;
                        m_Data[m_CIndexLoopup[x,y]] = ceilingColor;
                  }
            }

            // Write the data to the texture
            m_RenderTarget.SetData(m_Data);

            return m_RenderTarget;
        }
示例#3
0
        public Texture2D Render(RayCasterCamera rayCasterCamera, RayCasterMap rayCasterMap)
        {
            // Based on the raycaster tutorial at
            // http://www.student.kuleuven.be/~m0216922/CG/raycasting.html


            // Clear the screen
            for (int i = 0; i < m_ScreenWidth * m_ScreenHeight; i++)
            {
                m_Data[i] = 0;
            }


            // For each horizontal pixel
            for (int x = 0; x < m_ScreenWidth; x++)
            {
                double cameraX = 2 * x / (double)(m_ScreenWidth) - 1; //x-coordinate in RayCasterCamera space
                double rayPosX = rayCasterCamera.Position.X;
                double rayPosY = rayCasterCamera.Position.Y;
                double rayDirX = rayCasterCamera.Direction.X + rayCasterCamera.VectorPlane.X * cameraX;
                double rayDirY = rayCasterCamera.Direction.Y + rayCasterCamera.VectorPlane.Y * cameraX;

                //which box of the RayCasterMap we're in
                int mapX = (int)(rayPosX);
                int mapY = (int)(rayPosY);

                //length of ray from current position to next x or y-side
                double sideDistX;
                double sideDistY;

                //length of ray from one x or y-side to next x or y-side
                double deltaDistX = Math.Sqrt(1 + (rayDirY * rayDirY) / (rayDirX * rayDirX));
                double deltaDistY = Math.Sqrt(1 + (rayDirX * rayDirX) / (rayDirY * rayDirY));
                double perpWallDist;

                //what direction to step in x or y-direction (either +1 or -1)
                int stepX;
                int stepY;

                int hit  = 0; //was there a wall hit?
                int side = 0; //was a NS or a EW wall hit?

                //calculate step and initial sideDist
                if (rayDirX < 0)
                {
                    stepX     = -1;
                    sideDistX = (rayPosX - mapX) * deltaDistX;
                }
                else
                {
                    stepX     = 1;
                    sideDistX = (mapX + 1.0 - rayPosX) * deltaDistX;
                }
                if (rayDirY < 0)
                {
                    stepY     = -1;
                    sideDistY = (rayPosY - mapY) * deltaDistY;
                }
                else
                {
                    stepY     = 1;
                    sideDistY = (mapY + 1.0 - rayPosY) * deltaDistY;
                }


                //perform DDA
                while (hit == 0)
                {
                    //jump to next RayCasterMap square, OR in x-direction, OR in y-direction
                    if (sideDistX < sideDistY)
                    {
                        sideDistX += deltaDistX;
                        mapX      += stepX;
                        side       = 0;
                    }
                    else
                    {
                        sideDistY += deltaDistY;
                        mapY      += stepY;
                        side       = 1;
                    }

                    //Check if ray has hit a wall
                    if (rayCasterMap.WorldMap[mapX, mapY] > 0)
                    {
                        hit = 1;
                    }
                }

                //Calculate distance projected on RayCasterCamera direction (oblique distance will give fisheye effect!)
                if (side == 0)
                {
                    perpWallDist = Math.Abs((mapX - rayPosX + (1 - stepX) / 2) / rayDirX);
                }
                else
                {
                    perpWallDist = Math.Abs((mapY - rayPosY + (1 - stepY) / 2) / rayDirY);
                }

                //Calculate height of line to draw on screen
                int lineHeight = Math.Abs((int)(m_ScreenHeight / perpWallDist));

                //calculate lowest and highest pixel to fill in current stripe
                int drawStart = -lineHeight / 2 + m_ScreenHeight / 2;
                if (drawStart < 0)
                {
                    drawStart = 0;
                }
                int drawEnd = lineHeight / 2 + m_ScreenHeight / 2;
                if (drawEnd >= m_ScreenHeight)
                {
                    drawEnd = m_ScreenHeight - 1;
                }

                //texturing calculations
                int texNum = rayCasterMap.WorldMap[mapX, mapY] - 1;  //1 subtracted from it so that texture 0 can be used!

                //calculate value of wallX
                double wallX;   //where exactly the wall was hit
                if (side == 1)
                {
                    wallX = rayPosX + ((mapY - rayPosY + (1 - stepY) / 2) / rayDirY) * rayDirX;
                }
                else
                {
                    wallX = rayPosY + ((mapX - rayPosX + (1 - stepX) / 2) / rayDirX) * rayDirY;
                }
                wallX -= Math.Floor(wallX);

                //x coordinate on the texture
                var texX = (int)((wallX) * (double)TextureWidth);
                if (side == 0 && rayDirX > 0)
                {
                    texX = TextureWidth - texX - 1;
                }
                if (side == 1 && rayDirY < 0)
                {
                    texX = TextureWidth - texX - 1;
                }

                m_CurrentTexture = m_TextureLibrary[texNum];

                int index = x + (m_ScreenWidth * drawStart);
                for (int y = drawStart; y < drawEnd; y++)
                {
                    var d    = y * 256 - m_ScreenHeight * 128 + lineHeight * 128;
                    var texY = ((d * TextureHeight) / lineHeight) / 256;

                    // Darkness Calculations
                    var dval = (int)(perpWallDist * 2);
                    dval = Math.Min(47, dval);
                    var color = m_CurrentTexture.Texture[dval][texX, texY];

                    index        += m_ScreenWidth;
                    m_Data[index] = color;
                }

                // Floor Casting
                double floorXWall, floorYWall;   //x, y position of the floor texel at the bottom of the wall

                //4 different wall directions possible
                if (side == 0 && rayDirX > 0)
                {
                    floorXWall = mapX;
                    floorYWall = mapY + wallX;
                }
                else if (side == 0 && rayDirX < 0)
                {
                    floorXWall = mapX + 1.0;
                    floorYWall = mapY + wallX;
                }
                else if (side == 1 && rayDirY > 0)
                {
                    floorXWall = mapX + wallX;
                    floorYWall = mapY;
                }
                else
                {
                    floorXWall = mapX + wallX;
                    floorYWall = mapY + 1.0;
                }

                double distWall   = perpWallDist;
                double distPlayer = 0.0;

                m_FloorTexture   = m_TextureLibrary[4];
                m_CeilingTexture = m_TextureLibrary[4];

                if (drawEnd < 0)
                {
                    drawEnd = m_ScreenHeight;
                }

                //Draw the floor from drawEnd to the bottom of the screen
                for (int y = drawEnd + 1; y < m_ScreenHeight; y++)
                {
                    double currentDist = m_LookupTableFloorDist[y];

                    double weight = (currentDist - distPlayer) / (distWall - distPlayer);

                    double currentFloorX = weight * floorXWall + (1.0 - weight) * rayCasterCamera.Position.X;
                    double currentFloorY = weight * floorYWall + (1.0 - weight) * rayCasterCamera.Position.Y;

                    const int texWidth  = 64;
                    const int texHeight = 64;

                    var floorTexX = (int)(currentFloorX * 64) % texWidth;
                    var floorTexY = (int)(currentFloorY * 64) % texHeight;

                    var dval = (int)(currentDist * 2);
                    dval = Math.Min(47, dval);

                    var floorColor   = m_FloorTexture.Texture[dval][floorTexY, floorTexX];
                    var ceilingColor = m_CeilingTexture.Texture[dval][floorTexY, floorTexX];

                    // Write pixel
                    m_Data[m_FIndexLookup[x, y]] = floorColor;
                    m_Data[m_CIndexLoopup[x, y]] = ceilingColor;
                }
            }


            // Write the data to the texture
            m_RenderTarget.SetData(m_Data);

            return(m_RenderTarget);
        }
示例#4
0
        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            m_SpriteBatch = new SpriteBatch(GraphicsDevice);

            m_RayCaster = new RayCaster(m_Graphics.GraphicsDevice, RayCastRenderWidth, RayCastRenderHeight);

            m_Font1 = Content.Load<SpriteFont>("Courier New");

            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load<Texture2D>("Textures/242")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load<Texture2D>("Textures/244")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load<Texture2D>("Textures/241")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load<Texture2D>("Textures/203")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load<Texture2D>("Textures/245")));
            m_RayCaster.AddRayCasterTexture(new RayCasterTexture(Content.Load<Texture2D>("Textures/233")));

            m_RayCasterCamera = new RayCasterCamera();
            m_RayCasterMap = new RayCasterMap();
        }