private void PrepareCamera()
{
var camera = this.Camera;
if (camera != null)
{
Vertex back = camera.Position - camera.Target;
Vertex right = Camera.UpVector.VectorProduct(back);
Vertex up = back.VectorProduct(right);
back.Normalize();
right.Normalize();
up.Normalize();
this.back = back;
this.right = right;
this.up = up;
if (this.originalCamera == null)
{
this.originalCamera = new ScientificCamera();
}
this.originalCamera.Position = camera.Position;
this.originalCamera.UpVector = camera.UpVector;
}
}
public virtual void Read(BinaryReader stream)
{
centre = new Vertex(stream.ReadSingle(), stream.ReadSingle(), stream.ReadSingle());
directionX = new Vertex(stream.ReadSingle(), stream.ReadSingle(), stream.ReadSingle());
directionY = new Vertex(stream.ReadSingle(), stream.ReadSingle(), stream.ReadSingle());
directionZ = new Vertex(stream.ReadSingle(), stream.ReadSingle(), stream.ReadSingle());
// The X axis in SharpGL is always (1, 0, 0).
xAxis = new Vertex(1, 0, 0);
float angleX = xAxis.ScalarProduct(directionX);
yAxis = new Vertex(0, 1, 0);
float angleY = yAxis.ScalarProduct(directionY);
zAxis = new Vertex(0, 0, 1);
float angleZ = zAxis.ScalarProduct(directionZ);
angleX = (float)System.Math.Asin(angleX);
angleY = (float)System.Math.Asin(angleY);
angleZ = (float)System.Math.Asin(angleZ);
angleX = (180 * angleX) / (float)Math.PI;
angleY = (180 * angleY) / (float)Math.PI;
angleZ = (180 * angleZ) / (float)Math.PI;
rotate = new Vertex(-angleX, -angleY, -angleZ);
xAxis = xAxisGL = directionX;
yAxis = zAxisGL = directionY;
zAxis = yAxisGL = directionZ;
xAxisGL.X = -xAxisGL.X;
}
/// <summary>
/// This finds out if a point is in front of, behind, or on this plane.
/// </summary>
/// <param name="point">The point to classify.</param>
/// <returns>
/// Less than 0 if behind, 0 if on, Greater than 0 if in front.
/// </returns>
public float ClassifyPoint(Vertex point)
{
// (X-P)*N = 0. Where, X is a point to test, P is a point
// on the plane, and N is the normal to the plane.
return normal.ScalarProduct(point);
}
public static Vertex GetPackedTo01(this Vertex me)
{
Vertex temp = new Vertex(me);
temp.Normalize();
temp= (temp * 0.5f) + new Vertex(0.5f, 0.5f, 0.5f);
return temp;
}
/// <summary>
/// Apply a rotation transformation to a given Vertex.
/// </summary>
/// <param name="vertex">The given vertex</param>
/// <param name="focalPoint">The point to rotate around</param>
/// <param name="rotation">The rotation to apply (in degrees)</param>
/// <returns>The transformed vertex</returns>
public static Vertex VertexRotateTransform(Vertex vertex,
Vertex focalPoint, Vertex rotation)
{
Vertex rotationRadians = rotation;
rotationRadians.X = Convert.degreesToRadians(rotation.X);
rotationRadians.Y = Convert.degreesToRadians(rotation.Y);
rotationRadians.Z = Convert.degreesToRadians(rotation.Z);
return VertexRotateRadianTransform(vertex, focalPoint, rotationRadians);
}
public void MouseMove(int x, int y)
{
if (this.mouseDownFlag)
{
IViewCamera camera = this.Camera;
if (camera == null)
{
return;
}
Vertex back = this.back;
Vertex right = this.right;
Vertex up = this.up;
Size bound = this.bound;
Point downPosition = this.downPosition;
{
float deltaX = -horizontalRotationFactor * (x - downPosition.X) / bound.Width;
float cos = (float)Math.Cos(deltaX);
float sin = (float)Math.Sin(deltaX);
Vertex newBack = new Vertex(
back.X * cos + right.X * sin,
back.Y * cos + right.Y * sin,
back.Z * cos + right.Z * sin);
back = newBack;
right = up.VectorProduct(back);
back.Normalize();
right.Normalize();
}
{
float deltaY = verticalRotationFactor * (y - downPosition.Y) / bound.Height;
float cos = (float)Math.Cos(deltaY);
float sin = (float)Math.Sin(deltaY);
Vertex newBack = new Vertex(
back.X * cos + up.X * sin,
back.Y * cos + up.Y * sin,
back.Z * cos + up.Z * sin);
back = newBack;
up = back.VectorProduct(right);
back.Normalize();
up.Normalize();
}
camera.Position = camera.Target +
back * (float)((camera.Position - camera.Target).Magnitude());
camera.UpVector = up;
this.back = back;
this.right = right;
this.up = up;
this.downPosition.X = x;
this.downPosition.Y = y;
}
}
/// <summary>
/// This is a SharpGL helper version, that projects the vertex passed, using the
/// current matrixes.
/// </summary>
/// <param name="gl">The gl.</param>
/// <param name="vertex">The object coordinates.</param>
/// <returns>
/// The screen coords.
/// </returns>
public static Vertex Project(this OpenGL gl, Vertex vertex)
{
// THIS CODE MUST BE TESTED
double[] modelview = new double[16];
double[] projection = new double[16];
int[] viewport = new int[4];
gl.GetDouble(OpenGL.GL_MODELVIEW_MATRIX, modelview);
gl.GetDouble(OpenGL.GL_PROJECTION_MATRIX, projection);
gl.GetInteger(OpenGL.GL_VIEWPORT, viewport);
double[] x = new double[1]; // kludgy
double[] y = new double[1];
double[] z = new double[1];
gl.Project(vertex.X, vertex.Y, vertex.Z,
modelview, projection, viewport, x, y, z);
return new Vertex((float)x[0], (float)y[0], (float)z[0]);
}
public static Vertex[] GenerateGeometry(uint numberOfVertices, float maxRadius)
{
// Create a random number generator.
var random = new Random();
// Create the vertices.
var vertices = new Vertex[numberOfVertices];
// Set each point.
for (uint i = 0; i < numberOfVertices; i++ )
{
vertices[i].X = (float)((random.NextDouble() - 0.5) * (maxRadius * 2));
vertices[i].Y = (float)((random.NextDouble() - 0.5) * (maxRadius * 2));
vertices[i].Z = (float)((random.NextDouble() - 0.5) * (maxRadius * 2));
}
// Return the vertices.
return vertices;
}
/// <summary>
/// Apply a rotation transformation to a given Vertex.
/// </summary>
/// <param name="vertex">The given vertex</param>
/// <param name="focalPoint">The point to rotate around</param>
/// <param name="rotation">The rotation to apply (in radians)</param>
/// <returns>The transformed vertex</returns>
public static Vertex VertexRotateRadianTransform(Vertex vertex,
Vertex focalPoint, Vertex rotation)
{
//Convert to SlimMath Vectors
SlimMath.Vector3 vector = Convert.VertexToSlimMathVector3(
vertex);
SlimMath.Vector3 focalPointV = Convert.VertexToSlimMathVector3(
focalPoint);
SlimMath.Vector3 rotationV = Convert.VertexToSlimMathVector3(
rotation);
SlimMath.Matrix transform = SlimMath.Matrix.Identity;
transform.TranslationVector = vector;
transform *= SlimMath.Matrix.Translation(focalPointV * -1);
transform *= SlimMath.Matrix.RotationX(rotationV.X);
transform *= SlimMath.Matrix.RotationY(rotationV.Y);
transform *= SlimMath.Matrix.RotationZ(rotationV.Z);
transform *= SlimMath.Matrix.Translation(focalPointV);
return Convert.SlimMathVector3ToVertex(transform.TranslationVector);
}
/// <summary>
/// Initializes a new instance of the <see cref="Vertex"/> struct.
/// </summary>
/// <param name="vertex">The vertex.</param>
public Vertex(Vertex vertex)
{
X = vertex.X;
Y = vertex.Y;
Z = vertex.Z;
}
/// <summarY>
/// Find the Vector product (cross product) of two vectors.
/// </summarY>
/// <param name="rhs">The right hand side of the equation.</param>
/// <returns>The Cross Product.</returns>
public Vertex VectorProduct(Vertex rhs)
{
return new Vertex((Y * rhs.Z) - (Z * rhs.Y), (Z * rhs.X) - (X * rhs.Z),
(X * rhs.Y) - (Y * rhs.X));
}
/// <summarY>
/// This finds the Scalar Product (Dot Product) of two vectors.
/// </summarY>
/// <param name="rhs">The right hand side of the equation.</param>
/// <returns>A Scalar Representing the Dot-Product.</returns>
public float ScalarProduct(Vertex rhs)
{
return X * rhs.X + Y * rhs.Y + Z * rhs.Z;
}
/// <summary>
/// This is part of the shadow casting code, it does a shadowpass for the
/// polygon using the specified light.
/// </summary>
/// <param name="gl">The OpenGL object.</param>
/// <param name="light">The light casting the shadow.</param>
/// <param name="visibleArray">An array of bools.</param>
protected virtual void DoShadowPass(OpenGL gl, Vertex lightPos, bool[] visibleArray)
{
// Go through each face.
for(int i = 0; i < faces.Count; i++)
{
// Get a reference to the face.
Face face = faces[i];
// Is the face visible...
if(visibleArray[i])
{
// Go through each edge...
for(int j = 0; j < face.Indices.Count; j++)
{
// Get the neighbour of this edge.
int neighbourIndex = face.neighbourIndices[j];
// If there's no neighbour, or the neighbour ain't visible, it's
// an edge...
if(neighbourIndex == -1 || visibleArray[neighbourIndex] == false )
{
// Get the edge vertices.
Vertex v1 = vertices[face.Indices[j].Vertex];
Vertex v2 = vertices[face.Indices[(j+1)%face.Indices.Count].Vertex];
// Create the two distant vertices.
Vertex v3 = (v1 - lightPos) * 100;
Vertex v4 = (v2 - lightPos) * 100;
// Draw the shadow volume.
gl.Begin(OpenGL.TRIANGLE_STRIP);
gl.Vertex(v1);
gl.Vertex(v1 + v3);
gl.Vertex(v2);
gl.Vertex(v2 + v4);
gl.End();
}
}
}
}
}
/// <summary>
/// This creates a polygon from a height map (any picture). Black is low,
/// and the colors are high (the lighter the color, the higher the surface).
/// </summary>
/// <param name="filename">Path of the image file.</param>
/// <param name="xPoints">Number of points along X.</param>
/// <param name="yPoints">Number of points along Y.</param>
/// <returns>True if sucessful, false otherwise.</returns>
public virtual bool CreateFromMap(string filename, int xPoints, int yPoints)
{
// Try and load the image file.
System.Drawing.Bitmap map = new System.Drawing.Bitmap(filename);
if(map.Size.IsEmpty)
return false;
// Set the descriptive name.
Name = "Map created from '" + filename + "'";
// Get points.
for(int y=0; y < yPoints; y++)
{
int yValue = (map.Height / yPoints) * y;
for(int x=0; x < xPoints; x++)
{
int xValue = (map.Width / xPoints) * x;
// Get the pixel.
System.Drawing.Color col = map.GetPixel(xValue, yValue);
float xPos = (float)x / (float)xPoints;
float yPos = (float)y / (float)yPoints;
// Create a control point from it.
Vertex v = new Vertex(xPos, 0, yPos);
// Add the 'height', based on color.
v.Y = (float)col.R / 255.0f + (float)col.G / 255.0f +
(float)col.B / 255.0f;
// Add this vertex to the vertices array.
Vertices.Add(v);
}
}
// Create faces for the polygon.
for(int y=0; y < (yPoints-1); y++)
{
for(int x=0; x < (xPoints-1); x++)
{
// Create the face.
Face face = new Face();
// Create vertex indicies.
int nTopLeft = (y * xPoints) + x;
int nBottomLeft = ((y + 1) * xPoints) + x;
face.Indices.Add(new Index(nTopLeft));
face.Indices.Add(new Index(nTopLeft + 1));
face.Indices.Add(new Index(nBottomLeft + 1));
face.Indices.Add(new Index(nBottomLeft));
// Add the face.
Faces.Add(face);
}
}
return true;
}
/// <summary>
/// Initializes a new instance of the <see cref="VerticesPair" />
/// </summary>
/// <param name="x">The X coordinate of the <see cref="Vertex" />.</param>
/// <param name="y">The Y coordinate of the <see cref="Vertex" />.</param>
/// <param name="offsetZ">The Z coordinate offset of the top <see cref="Vertex" />. The base <see cref="Vertex" /> has the offset "0".</param>
/// <param name="addendum">The addendum to the <see cref="offsetZ" /> - to extend the axiliary geometry out of the solid body.</param>
public VerticesPair(float x, float y, float offsetZ, float addendum)
{
Top = new Vertex(x, y, offsetZ + addendum);
Base = new Vertex(x, y, 0 - addendum);
}
/// <summary>
/// This function reads a polygon.
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
protected override object ReadData(BinaryReader reader)
{
// Create a polygon.
Polygon poly = new Polygon();
// Read a name chunk.
CaligariName name = new CaligariName();
name.Read(reader);
poly.Name = name.name;
// Read the local axies.
CaligariAxies axies = new CaligariAxies();
axies.Read(reader);
poly.Translate = axies.centre;
// poly.Rotate = axies.rotate;
// Read the position matrix.
CaligariPosition pos = new CaligariPosition();
pos.Read(reader);
// Read number of verticies.
int verticesCount = reader.ReadInt32();
// Get them all
for(int i=0; i<verticesCount; i++)
{
// Read a vertex.
Vertex vertex = new Vertex(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
// Multiply it by the position matrix.
vertex = vertex * pos.matrix;
// Add it.
poly.Vertices.Add(vertex);
}
// Read UV count.
int uvsCount = reader.ReadInt32();
// Read all of the UVs
for(int i=0; i<uvsCount; i++)
poly.UVs.Add(new UV(reader.ReadInt32(), reader.ReadInt32()));
// Read faces count.
int faces = reader.ReadInt32();
// Read each face.
for(int f= 0; f<faces; f++)
{
Face face = new Face();
poly.Faces.Add(face);
// Read face type flags.
byte flags = reader.ReadByte();
// Read vertex count
short verticesInFace = reader.ReadInt16();
// Do we read a material number?
if((flags&0x08) == 0) // is it a 'hole' face?
reader.ReadInt16();
// Now read the indices, a vertex index and a uv index.
for(short j=0; j<verticesInFace; j++)
face.Indices.Add(new Index(reader.ReadInt32(), reader.ReadInt32()));
}
// Any extra stuff?
if(header.minorVersion > 4)
{
// read flags.
reader.ReadChars(4);
if((header.minorVersion > 5) && (header.minorVersion < 8))
reader.ReadChars(2);
}
// Now that we've loaded the polygon, we triangulate it.
poly.Triangulate();
// Finally, we update normals.
poly.Validate(true);
return poly;
}
protected override object LoadData(Stream stream)
{
// We use a binary reader for this data.
BinaryReader reader = new BinaryReader(stream, System.Text.Encoding.ASCII);
// Create a polygon.
Polygon poly = new Polygon();
// Read the translate, scale, rotate.
poly.Translate.X = reader.ReadSingle();
poly.Translate.Y = reader.ReadSingle();
poly.Translate.Z = reader.ReadSingle();
poly.Scale.X = reader.ReadSingle();
poly.Scale.Y = reader.ReadSingle();
poly.Scale.Z = reader.ReadSingle();
poly.Rotate.X = reader.ReadSingle();
poly.Rotate.Y = reader.ReadSingle();
poly.Rotate.Z = reader.ReadSingle();
// Read number of verticies.
int verticesCount = reader.ReadInt32();
// Get them all
for(int i=0; i<verticesCount; i++)
{
// Read a vertex.
Vertex vertex = new Vertex(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
// Add it.
poly.Vertices.Add(vertex);
}
// Read UV count.
int uvsCount = reader.ReadInt32();
// Read all of the UVs
for(int i=0; i<uvsCount; i++)
poly.UVs.Add(new UV(reader.ReadInt32(), reader.ReadInt32()));
// Read faces count.
int faces = reader.ReadInt32();
// Read each face.
for(int f= 0; f<faces; f++)
{
Face face = new Face();
poly.Faces.Add(face);
// Read index count
int indices = reader.ReadInt32();
// Now read the indices, a vertex index and a uv index and a color index.
for(int j=0; j<indices; j++)
{
face.Indices.Add(new Index(reader.ReadInt32(), reader.ReadInt32()));
int colour = reader.ReadInt32(); //not used.
}
}
// Finally, we update normals.
poly.Validate(true);
return poly;
}
/// <summary>
/// Constructs a new Keyframe
/// </summary>
/// <param name="time">Keyframe time</param>
/// <param name="type">Keyframe type</param>
/// <param name="transformation">Keyframe transformation</param>
public Keyframe(float time, KeyframeType type, Vertex transformation)
{
this.time = time;
this.type = type;
transform = transformation;
}
/// <summary>
/// Vertexes the pointer.
/// </summary>
/// <param name="gl">The gl.</param>
/// <param name="size">The size.</param>
/// <param name="type">The type.</param>
/// <param name="stride">The stride.</param>
/// <param name="pointer">The pointer.</param>
public static void VertexPointer(this OpenGL gl, int size, uint type, int stride, Vertex[] pointer)
{
// TODO debug this.
var handle = GCHandle.Alloc(pointer, GCHandleType.Pinned);
gl.VertexPointer(size, type, stride, handle.AddrOfPinnedObject());
handle.Free();
}
private static Vertex OffsetLookAtCamera(float dx, float dy, float dz, Vertex pos)
{
return new Vertex(pos.X + dx, pos.Y + dy, pos.Z + dz);
}
public void setKeyframe(string boneName, int index, float time, int type, string transform)
{
KeyframeType typ = KeyframeType.Translation;
if (type == 1) typ = KeyframeType.Rotation;
string[] xyz = transform.Split(':');
Vertex vertex;
vertex = new Vertex(
float.Parse(xyz[0]), float.Parse(xyz[1]), float.Parse(xyz[2]));
foreach (Bone bone in model.Bones)
{
if (bone.Name == boneName)
{
if (index > -1 && index < bone.Animation.Count)
{
bone.Animation[index].Time = time;
bone.Animation[index].Type = typ;
bone.Animation[index].Transformation = vertex;
bone.Translation = new Vertex();
bone.Rotation = new Vertex();
if (ModelUpdated != null)
ModelUpdated(this, new EventArgs());
}
}
}
}
public static SlimMath.Vector3 VertexToSlimMathVector3(Vertex vertex)
{
return new SlimMath.Vector3(vertex.X, vertex.Y, vertex.Z);
}
/// <summary>
/// Constructs a new Keyframe
/// </summary>
/// <param name="type">Keyframe type</param>
public Keyframe(KeyframeType type)
{
time = 0.0f;
this.type = type;
transform = new Vertex(0, 0, 0);
}
/// <summary>
/// Calculate the distance between two specified 3D vectors.
/// </summary>
/// <param name="v1">The first of the two vectors</param>
/// <param name="v2">The second of the two vectors</param>
/// <returns>The distance between the two points</returns>
public static float VertexDistance(Vertex v1, Vertex v2)
{
return (float)Math.Sqrt(Math.Pow(v1.X - v2.X, 2) + Math.Pow(v1.Y - v2.Y, 2) + Math.Pow(v1.Z - v2.Z, 2));
}
/// <summary>
/// This function is cool, just stick in a set of points, it'll add them to the
/// array, and create a face. It will take account of duplicate vertices too!
/// </summary>
/// <param name="vertexData">A set of vertices to make into a face.</param>
public virtual void AddFaceFromVertexData(Vertex[] vertexData)
{
// Create a face.
Face newFace = new Face();
// Go through the vertices...
foreach(Vertex v in vertexData)
{
// Do we have this vertex already?
int at = vertices.Find(0, v, 0.01f);
// Add the vertex, and index it.
newFace.Indices.Add(new Index( (at == -1) ? vertices.Add(v) : at));
}
// Add the face.
faces.Add(newFace);
}
public virtual void Clamp(Vertex v)
{
float diff = v.X % size;
if(diff > size/2) diff -=size;
v.X -= diff;
diff = v.Y % size;
if(diff > size/2) diff -=size;
v.Y -= diff;
diff = v.Z % size;
if(diff > size/2) diff -=size;
v.Z -= diff;
}
public Keyframe createKeyframe(string boneName, float time, int type, string vector)
{
KeyframeType typ = KeyframeType.Translation;
if (type == 2) typ = KeyframeType.Rotation;
string[] xyz = vector.Split(':');
Vertex vertex = new Vertex(
float.Parse(xyz[0]), float.Parse(xyz[1]), float.Parse(xyz[2]));
Keyframe keyframe = new Keyframe(time, typ, vertex);
foreach (Bone bone in model.Bones)
{
if (bone.Name == boneName)
{
bone.Animation.Add(keyframe);
if (ModelUpdated != null)
ModelUpdated(this, new EventArgs());
break;
}
}
return keyframe;
}
/// <summary>
/// Zoom the camera given a zoom factor.
/// </summary>
/// <param name="factor">The zoom factor</param>
public void Zoom(float factor)
{
Vertex A = this.Target;
Vertex B = initialPosition;
Vertex magnitude = new Vertex(B.X - A.X, B.Y - A.Y, B.Z - A.Z);
initialPosition = magnitude * factor;
updateRotation();
}
/// <summary>
/// Rotates this vertex around an axel
/// </summary>
/// <param name="n">The vertex to rotate</param>
/// <param name="a">The amount to rotate by (angle)</param>
/// <param name="v">The axel to rotate around</param>
/// <returns></returns>
public static Vertex RotateAroundAxis(this Vertex n, float a, Vertex v)
{
return v*(float) Math.Cos(a) +
( n * v.ScalarProduct(n) * (1 - (float) Math.Cos(a)) + (n.VectorProduct(v)*(float) Math.Sin(a)));
}
private static vec3 ToVec3(SharpGL.SceneGraph.Vertex vertex)
{
vec3 result = new vec3(vertex.X, vertex.Y, vertex.Z);
return(result);
}
/// <summary>
/// Initializes a new instance of the <see cref="Vertex"/> struct.
/// </summary>
/// <param name="vertex">The vertex.</param>
public Vertex(Vertex vertex)
{
this.x = vertex.X;
this.y = vertex.Y;
this.z = vertex.Z;
}
public override void ReadData(Scene scene, BinaryReader stream)
{
// Read number of vertices.
short vertexCount = 0;
vertexCount = stream.ReadInt16();
// Read each vertex and add it.
for(short i = 0; i < vertexCount; i++)
{
Vertex v = new Vertex();
v.X = stream.ReadSingle();
v.Y = stream.ReadSingle();
v.Z = stream.ReadSingle();
vertices.Add(v);
}
}
/// <summary>
/// Construct a new empty keyframe
/// (Defaulted to a type of Translation)
/// </summary>
public Keyframe()
{
time = 0.0f;
type = KeyframeType.Translation;
transform = new Vertex(0, 0, 0);
}