/// <summary>
/// Collides a ray against the world and returns the name of the
/// first model the ray collided with.
/// </summary>
/// <param name="origin">The origin of the ray.</param>
/// <param name="direction">The direction of the ray.</param>
/// <param name="length">The length of the ray.</param>
/// <returns>The name of the model, or null if no collision occured.</returns>
public static string GetCollisionModel(Math.Vector3 origin, Math.Vector3 direction, float length)
{
float distance;
foreach (SceneModel model in _models)
{
if (model.Visible && model.Model.CollideRay(Math.Vector3.Zero, origin, direction, length, out distance))
{
return(model.Model.NameWithoutExtension);
}
}
foreach (Game.Actor actor in _actors)
{
if (actor.CollideRay(origin, direction, length, out distance))
{
return(actor.ModelName);
}
}
Graphics.BspSurface surface;
if (_currentRoom != null && _currentRoom.CollideRayWithSurfaces(origin, direction, length, out surface) == true)
{
return(_currentRoom.GetModelName(surface.modelIndex));
}
return(null);
}
public static void renderRadiosityCallback(Radiosity.HemicubeRenderType type,
int viewportX, int viewportY, int viewportWidth, int viewportHeight,
float eyeX, float eyeY, float eyeZ,
float directionX, float directionY, float directionZ,
float upX, float upY, float upZ)
{
Graphics.RendererManager.CurrentRenderer.Viewport = new Graphics.Viewport(viewportX, viewportY, viewportWidth, viewportHeight);
Graphics.Camera c = null;
bool zNegOne = (Graphics.RendererManager.CurrentRenderer.ZClipMode == Gk3Main.Graphics.ZClipMode.NegativeOne);
const float near = 2.0f;
Math.Vector3 position = new Math.Vector3(eyeX, eyeY, eyeZ);
Math.Vector3 direction = new Math.Vector3(directionX, directionY, directionZ);
if (type == Radiosity.HemicubeRenderType.Front)
{
c = new Graphics.Camera(90.0f * 0.0174532925f, 1.0f, near, 1000.0f, zNegOne);
}
else if (type == Radiosity.HemicubeRenderType.Top)
{
Math.Matrix projection = Math.Matrix.PerspectiveOffCenter(-near, near, -near, 0, near, 1000.0f, zNegOne);
c = new Graphics.Camera(projection);
}
else if (type == Radiosity.HemicubeRenderType.Bottom)
{
Math.Matrix projection = Math.Matrix.PerspectiveOffCenter(-near, near, 0, near, near, 1000.0f, zNegOne);
c = new Graphics.Camera(projection);
}
else if (type == Radiosity.HemicubeRenderType.Left)
{
Math.Matrix projection = Math.Matrix.PerspectiveOffCenter(0, near, -near, near, near, 1000.0f, zNegOne);
c = new Graphics.Camera(projection);
}
else if (type == Radiosity.HemicubeRenderType.Right)
{
Math.Matrix projection = Math.Matrix.PerspectiveOffCenter(-near, 0, -near, near, near, 1000.0f, zNegOne);
c = new Graphics.Camera(projection);
}
c.LookAt(new Math.Vector3(eyeX, eyeY, eyeZ), new Math.Vector3(directionX, directionY, directionZ), new Math.Vector3(upX, upY, upZ));
if (_currentSkybox != null)
{
_currentSkybox.Render(c);
}
_currentRoom.Render(c, _currentLightmaps, true);
// add any omni lights
foreach (OmniInfo omni in _omniLightInfo)
{
Graphics.BillboardManager.AddBillboard(omni.Info.Position, omni.Info.Radius, omni.Info.Radius, omni.MemTex, omni.AlphaMask);
}
// render any billboards
Graphics.BillboardManager.RenderBillboardsWithAlpha(c);
}
public static void AddActor(string modelName, string noun, Math.Vector3 position, float heading, bool isEgo)
{
Game.Actor actor = new Game.Actor(_sceneContentManager, modelName, noun, isEgo);
actor.Position = position;
actor.FacingAngle = heading;
_actors.Add(actor);
actor.LoadClothing(_sceneContentManager);
}
private static Graphics.SkyBox loadSkybox(Game.ScnResource scn, bool addSun)
{
if (string.IsNullOrEmpty(scn.SkyboxLeft) == false &&
string.IsNullOrEmpty(scn.SkyboxRight) == false &&
string.IsNullOrEmpty(scn.SkyboxFront) == false &&
string.IsNullOrEmpty(scn.SkyboxBack) == false &&
string.IsNullOrEmpty(scn.SkyboxUp) == false &&
string.IsNullOrEmpty(scn.SkyboxDown) == false)
{
System.IO.Stream frontStream = FileSystem.Open(scn.SkyboxFront + ".BMP");
System.IO.Stream backStream = FileSystem.Open(scn.SkyboxBack + ".BMP");
System.IO.Stream leftStream = FileSystem.Open(scn.SkyboxLeft + ".BMP");
System.IO.Stream rightStream = FileSystem.Open(scn.SkyboxRight + ".BMP");
System.IO.Stream upStream = FileSystem.Open(scn.SkyboxUp + ".BMP");
Graphics.BitmapSurface fronts = new Graphics.BitmapSurface(frontStream);
Graphics.BitmapSurface backs = new Graphics.BitmapSurface(backStream);
Graphics.BitmapSurface lefts = new Graphics.BitmapSurface(leftStream);
Graphics.BitmapSurface rights = new Graphics.BitmapSurface(rightStream);
Graphics.BitmapSurface ups = new Graphics.BitmapSurface(upStream);
Graphics.BitmapSurface downs = null;
try
{
System.IO.Stream downStream = FileSystem.Open(scn.SkyboxDown + ".BMP");
downs = new Graphics.BitmapSurface(downStream);
downStream.Close();
}
catch (System.IO.FileNotFoundException)
{
downs = lefts;
}
frontStream.Close();
backStream.Close();
leftStream.Close();
rightStream.Close();
upStream.Close();
Gk3Main.Graphics.SkyBox sb = new Gk3Main.Graphics.SkyBox(scn.Name + "_skybox", fronts, backs,
lefts, rights, ups, downs, Utils.DegreesToRadians(scn.SkyboxAzimuth));
if (addSun)
{
Math.Vector3 dir = new Math.Vector3(0.4873306f, -0.8727542f, 0.02844055f);
//Gk3Main.Graphics.SkyBox.AddSun(dir, new Math.Vector3(1.0f, 0, 0), 0.025f, fronts, backs, lefts, rights, ups, false);
sb.AddSun(dir, new Math.Vector3(1.0f, 0, 0), false);
}
return(sb);
}
return(null);
}
public static bool TestRaySphereCollision(Math.Vector3 origin,
Math.Vector3 direction, Math.Vector3 spherePosition, float radius, out float distance)
{
Math.Vector3 sphereToOrigin = origin - spherePosition;
float b = 2 * (sphereToOrigin.Dot(direction));
float c = sphereToOrigin.Dot(sphereToOrigin) - radius * radius;
float d = b * b - 4 * c;
if (d < 0)
{
distance = 0;
return(false);
}
float dsqrt = (float)System.Math.Sqrt(d);
float q;
if (b < 0)
{
q = (-b - dsqrt) * 0.5f;
}
else
{
q = (-b + dsqrt) * 0.5f;
}
float t0 = q;
float t1 = c / q;
if (t0 > t1)
{
float tmp = t0;
t0 = t1;
t1 = tmp;
}
if (t1 < 0)
{
distance = 0;
return(false);
}
if (t0 < 0)
{
distance = t1;
}
else
{
distance = t1;
}
return(true);
}
public static void SetActorPosition(string noun, Math.Vector3 position, float heading)
{
foreach (Actor actor in _actors)
{
if (actor.Noun.Equals(noun, StringComparison.OrdinalIgnoreCase))
{
actor.Position = position;
actor.FacingAngle = heading;
actor.Model.ClearAnimatedTransforms();
break;
}
}
}
public static bool TestRayAABBCollision(Math.Vector3 aabbOffset, Math.Vector3 origin,
Math.Vector3 direction, float[] aabb, out float distance)
{
// based on http://www.cs.utah.edu/~awilliam/box/box.pdf
distance = float.MinValue;
Math.Vector3 inverseDirection = new Math.Vector3(1.0f / direction.X, 1.0f / direction.Y, 1.0f / direction.Z);
int signX = inverseDirection.X < 0 ? 1 : 0;
int signY = inverseDirection.Y < 0 ? 1 : 0;
int signZ = inverseDirection.Z < 0 ? 1 : 0;
float tmin = (aabb[signX * 3 + 0] + aabbOffset.X - origin.X) * inverseDirection.X;
float tmax = (aabb[(1 - signX) * 3 + 0] + aabbOffset.X - origin.X) * inverseDirection.X;
float tymin = (aabb[signY * 3 + 1] + aabbOffset.Y - origin.Y) * inverseDirection.Y;
float tymax = (aabb[(1 - signY) * 3 + 1] + aabbOffset.Y - origin.Y) * inverseDirection.Y;
if (tmin > tymax || tymin > tmax)
{
return(false);
}
if (tymin > tmin)
{
tmin = tymin;
}
if (tymax < tmax)
{
tmax = tymax;
}
float tzmin = (aabb[signZ * 3 + 2] + aabbOffset.Z - origin.Z) * inverseDirection.Z;
float tzmax = (aabb[(1 - signZ) * 3 + 2] + aabbOffset.Z - origin.Z) * inverseDirection.Z;
if (tmin > tzmax || tzmin > tmax)
{
return(false);
}
if (tzmin > tmin)
{
tmin = tzmin;
}
if (tzmax < tmax)
{
tmax = tzmax;
}
distance = tmin;
return(tmin > 0);
}
public static bool TestRayTriangleCollision(Math.Vector3 origin,
Math.Vector3 direction, Math.Vector3 v1,
Math.Vector3 v2, Math.Vector3 v3,
out float distance, out Math.Vector3?collisionPoint)
{
distance = 0;
collisionPoint = null;
const float EPSILON = 0.00001f;
Math.Vector3 edge1 = v2 - v1;
Math.Vector3 edge2 = v3 - v1;
Math.Vector3 pvec = direction.Cross(edge2);
float det = edge1.Dot(pvec);
if (det > -EPSILON && det < EPSILON)
{
return(false);
}
float inv_det = 1.0f / det;
Math.Vector3 tvec = origin - v1;
float u = tvec.Dot(pvec) * inv_det;
if (u < 0.0f || u > 1.0f)
{
return(false);
}
Math.Vector3 qvec = tvec.Cross(edge1);
float v = direction.Dot(qvec) * inv_det;
if (v < 0.0f || u + v > 1.0f)
{
return(false);
}
// pack up the results
distance = edge2.Dot(qvec) * inv_det;
collisionPoint = v1 + edge1 * u + edge2 * v;
return(true);
}
