/// <summary>
/// Recursive binary search to determine rays (x,y,z) intersection point with Terrain.
/// </summary>
/// <param name="count"></param>
/// <param name="start"></param>
/// <param name="finish"></param>
/// <param name="ray"></param>
/// <returns></returns>
private Vector3 BinarySearch(int count, float start, float finish, Vector3 ray)
{
float half = start + ((finish - start) / 2f);
if (count >= JConfig.MOUSE_PICKER_RECURSION_COUNT)
{
Vector3 endPoint = GetPointOnRay(ray, half);
JPerlinTerrain terrain = GetTerrain(endPoint.X, endPoint.Z);
if (terrain != null)
{
return(endPoint);
}
else
{
return(new Vector3(0, 0, 0));
}
}
if (IntersectionInRange(start, half, ray))
{
return(BinarySearch(count + 1, start, half, ray));
}
else
{
return(BinarySearch(count + 1, half, finish, ray));
}
}
/// <summary>
/// Create a JMousePicker instance. JMousePicker will project a 2D screen coordinate into a 3D unit vector within the world.
/// It can determine intersection with terrain as well as check for intersection with a JBoundingSphere.
/// </summary>
/// <param name="camera">The JCamera entity.</param>
/// <param name="projectionMatrix">The JMasterRenderers Projection Matrix based off of the JCameras properties.</param>
/// <param name="terrain">The JTerrain the Mouse Ray will intersect with.</param>
/// <param name="gameWindow">The active JGameWindow. We need this to get it's height and width.</param>
public JMousePicker(JCamera camera, Matrix4 projectionMatrix, JPerlinTerrain terrain, JGameWindow gameWindow)
{
Camera = camera;
ProjectionMatrix = projectionMatrix;
ViewMatrix = JMathUtils.createViewMatrix(camera);
Terrain = terrain;
GameWindow = gameWindow;
}
private void PrepareTerrainModel(JPerlinTerrain terrain)
{
JRawModel rawModel = terrain.TerrainModel;
GL.BindVertexArray(rawModel.vaoID);
EnableAttribArrays();
BindTextures(terrain);
TerrainShader.LoadShineVariables(1, 0);
}
private void BindTextures(JPerlinTerrain terrain)
{
JTerrainTexturePack texturePack = terrain.TexturePack;
TextureUnit texture = TextureUnit.Texture0;
for (int i = 0; i < texturePack.TerrainTextures.Count; i++)
{
GL.ActiveTexture(texture);
GL.BindTexture(TextureTarget.Texture2D, texturePack.TerrainTextures[i].TextureID);
texture++;
}
}
/// <summary>
///
/// </summary>
/// <param name="terrain"></param>
public void Translate(JPerlinTerrain terrain)
{
float distance = currentSpeed * JGameWindow.Delta;
float dX = distance * (Orientation.X / Orientation.Length);
float dZ = distance * (Orientation.Z / Orientation.Length);
upwardSpeed += GRAVITY * JGameWindow.Delta;
base.IncreasePosition(dX, upwardSpeed * JGameWindow.Delta, dZ);
float terrainHeight = terrain.GetHeightOfTerrain(base.Position.X, base.Position.Z);
if (base.Position.Y < terrainHeight)
{
upwardSpeed = 0;
isInAir = false;
base.Position = new Vector3(Position.X, terrainHeight, Position.Z);
}
}
/// <summary>
/// Determine whether point falls below Terrain.
/// </summary>
/// <param name="point"></param>
/// <returns></returns>
private Boolean IsUnderGround(Vector3 point)
{
JPerlinTerrain terrain = GetTerrain(point.X, point.Z);
float height = 0;
if (terrain != null)
{
height = terrain.GetHeightOfTerrain(point.X, point.Z);
}
if (point.Y < height)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Update the position of JBoundedEntity each frame and update the position of JBoundingSphere to match.
/// </summary>
/// <param name="terrain"></param>
public void Move(JPerlinTerrain terrain)
{
if (Destination.IsSet)
{
DistanceToDestination();
if (!IsAtDestination)
{
currentSpeed = RUN_SPEED;
}
else
{
currentSpeed = 0;
IsAtDestination = true;
Destination.IsSet = false;
}
}
Translate(terrain);
BoundingSphere.SphereEntity.Position = new Vector3(Position.X, Position.Y + 1, Position.Z);
}
public void RenderScene(List <JBoundedEntity> entities, List <JEntity> staticEntities, JPerlinTerrain terrain, JLight light, JCamera camera, Vector4 clippingPlane)
{
processTerrain(terrain);
foreach (JBoundedEntity entity in entities)
{
ProcessEntity(entity);
ProcessEntity(entity.BoundingSphere.SphereEntity);
}
foreach (JEntity entity in staticEntities)
{
ProcessEntity(entity);
}
Render(light, camera, clippingPlane);
}
public void processTerrain(JPerlinTerrain terrain)
{
terrains.Add(terrain);
}
/// <summary>
/// GraphicsMode used for anitaliasing.
/// </summary>
public JGameWindow() : base(WIDTH, HEIGHT, new OpenTK.Graphics.GraphicsMode(32, 24, 0, 8), "JModelViewer", GameWindowFlags.Default, DisplayDevice.Default, 3, 0, GraphicsContextFlags.ForwardCompatible)
{
PlayerTexturePath = JFileUtils.GetPathToResFile("Cowboy\\CowboyTexture.png");
PlayerModelPath = JFileUtils.GetPathToResFile("Cowboy\\Cowboy.obj");
Version version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
DateTime buildDate = new DateTime(2000, 1, 1).AddDays(version.Build).AddSeconds(version.Revision * 2);
string displayVersion = $"{version} ({buildDate})";
Console.WriteLine("JGameEngine v." + displayVersion);
Console.WriteLine("OpenGL version: " + GL.GetString(StringName.Version));
Loader = new JLoader();
PlayerModelData = JObjFileLoader.LoadObj(PlayerModelPath);
Console.WriteLine("Using .obj file: " + PlayerModelPath);
PlayerModel = Loader.LoadToVAO(PlayerModelData.Vertices, PlayerModelData.TextureCoords, PlayerModelData.Normals, PlayerModelData.Indices);
Console.WriteLine("Using .png texture file: " + PlayerTexturePath + "...");
JModelTexture texture = new JModelTexture(Loader.loadTexture(PlayerTexturePath));
TexturedModel = new JTexturedModel(PlayerModel, texture);
Light = new JLight(new Vector3(0, 0, 0), new Vector3(1, 1, 1));
JTerrainTexture textureWaterDeep = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\WaterDeep.png")));
JTerrainTexture textureWaterShallow = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\WaterShallow.png")));
JTerrainTexture textureSand = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\Sand.png")));
JTerrainTexture textureGrassNatural = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\GrassNatural.png")));
JTerrainTexture textureGrassLush = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\GrassLush.png")));
JTerrainTexture textureMountainNatural = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\MountainNatural.png")));
JTerrainTexture textureMountainRocky = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\MountainRocky.png")));
JTerrainTexture textureSnow = new JTerrainTexture(Loader.loadTexture(JFileUtils.GetPathToResFile("Terrain\\Snow.png")));
JTerrainTexturePack texturePack = new JTerrainTexturePack();
texturePack.AddTerrainTexture(textureWaterDeep, 0.1f);
texturePack.AddTerrainTexture(textureWaterShallow, 0.15f);
texturePack.AddTerrainTexture(textureSand, 0.18f);
texturePack.AddTerrainTexture(textureGrassNatural, 0.35f);
texturePack.AddTerrainTexture(textureGrassLush, 0.45f);
texturePack.AddTerrainTexture(textureMountainNatural, 0.6f);
texturePack.AddTerrainTexture(textureMountainRocky, 0.7f);
texturePack.AddTerrainTexture(textureSnow, 0.8f);
MasterRenderer = new JMasterRenderer(texturePack);
WaterBuffer = new JWaterFrameBuffer(this);
WaterShader = new JWaterShader();
waterTiles = new List <JWaterTile>();
WaterTile = new JWaterTile(400, -400, 8, textureWaterShallow);
waterTiles.Add(WaterTile);
waterRenderer = new JWaterRenderer(Loader, WaterShader, MasterRenderer.projectionMatrix, WaterBuffer, WaterTile);
terrain = new JPerlinTerrain(0, -1, Loader, texturePack);
Entity = new JBoundedEntity(TexturedModel, new Vector3(50, 0, -50), new Vector3(0, 0, 1), 0.1f, Loader);
Entity2 = new JBoundedEntity(TexturedModel, new Vector3(100, 0, -50), new Vector3(0, 0, 1), 0.1f, Loader);
EntityList = new List <JBoundedEntity>();
EntityList.Add(Entity);
EntityList.Add(Entity2);
// Generate Trees
JEntityGenerator entityGenerator = new JEntityGenerator(Loader, terrain, WaterTile);
StaticEntities = entityGenerator.GenerateTrees();
Camera = new JCameraFree();
picker = new JMousePicker(Camera, MasterRenderer.projectionMatrix, terrain, this);
LastFrameTime = GetCurrentTime();
}
private void LoadModelMatrix(JPerlinTerrain terrain)
{
Matrix4 transformationMatrix = JMathUtils.createTransformationMatrix(new Vector3(terrain.X, 0, terrain.Z), 0, 0, 0, 1);
TerrainShader.LoadTransformationMatrix(transformationMatrix);
}
/// <summary>
///
/// </summary>
/// <param name="loader"></param>
/// <param name="terrain"></param>
public JEntityGenerator(JLoader loader, JPerlinTerrain terrain, JWaterTile waterTile)
{
Loader = loader;
Terrain = terrain;
WaterTile = waterTile;
}
