public void Render(Bitmap output, IFunctionR2ToR funct)
{
if (output == null ||
funct == null)
{
return;
}
prepareProjection(output, funct);
// !!!{{ TODO: add the graph rendering code here
Graphics gr = Graphics.FromImage(output);
Pen pen = new Pen(Color.FromArgb(255, 255, 80), 1.0f);
float x, dx, z, dz;
float ax, ay, bx, by;
dx = (float)(funct.MaxX - funct.MinX) / Columns;
dz = (float)(funct.MaxZ - funct.MinZ) / Rows;
z = (float)funct.MinZ;
x = (float)funct.MinX;
for (int i = 1; i < Columns; i++, x += dx)
{
transform(x, z, out ax, out ay);
transform(x + dx, z, out bx, out by);
gr.DrawLine(pen, ax, ay, bx, by);
}
for (int j = 1; j < Rows; j++, z += dz)
{
x = (float)funct.MinX;
transform(x, z, out ax, out ay);
transform(x, z + dz, out bx, out by);
gr.DrawLine(pen, ax, ay, bx, by);
for (int i = 1; i < Columns; i++, x += dx)
{
transform(x, z + dz, out ax, out ay);
transform(x + dx, z + dz, out bx, out by);
gr.DrawLine(pen, ax, ay, bx, by);
transform(x + dx, z, out ax, out ay);
gr.DrawLine(pen, ax, ay, bx, by);
}
}
// !!!}}
}
protected void prepareProjection(Bitmap output, IFunctionR2ToR funct)
{
f = funct;
Vector3 center;
center.X = 0.5f * (float)(f.MaxX + f.MinX);
center.Z = 0.5f * (float)(f.MaxZ + f.MinZ);
center.Y = (float)(0.5 * f.f(center.X, center.Z));
float diameter = (float)((f.MaxX - f.MinX) + (f.MaxZ - f.MinZ));
if (Distance < diameter)
{
Distance = diameter;
}
// and the rest of projection matrix goes here:
int width = output.Width;
int height = output.Height;
float aspect = width / (float)height;
double az = Azimuth / 180.0 * Math.PI;
double el = Elevation / 180.0 * Math.PI;
Vector3 eye = new Vector3((float)(center.X + Distance * Math.Sin(az) * Math.Cos(el)),
(float)(center.Y + Distance * Math.Sin(el)),
(float)(center.Z + Distance * Math.Cos(az) * Math.Cos(el)));
Matrix4 modelView = Matrix4.LookAt(eye, center, Vector3.UnitY);
Matrix4 proj;
if (Perspective)
{
float vv = (float)(2.0 * Math.Atan2(diameter * 0.5, Distance));
proj = Matrix4.CreatePerspectiveFieldOfView(vv, aspect, 1.0f, 50.0f);
}
else
{
float vHalf = diameter * 0.52f;
proj = Matrix4.CreateOrthographicOffCenter(-vHalf, vHalf,
-vHalf / aspect, vHalf / aspect,
1.0f, 50.0f);
}
compound = Matrix4.Mult(modelView, proj);
Matrix4 viewport = Geometry.SetViewport(0, 0, width, height);
compound = Matrix4.Mult(compound, viewport);
}
protected void prepareProjection( Bitmap output, IFunctionR2ToR funct )
{
f = funct;
Vector3 center;
center.X = 0.5f * (float)(f.MaxX + f.MinX);
center.Z = 0.5f * (float)(f.MaxZ + f.MinZ);
center.Y = (float)( 0.5 * f.f( center.X, center.Z ) );
float diameter = (float)((f.MaxX - f.MinX) + (f.MaxZ - f.MinZ));
if ( Distance < diameter ) Distance = diameter;
// and the rest of projection matrix goes here:
int width = output.Width;
int height = output.Height;
float aspect = width / (float)height;
double az = Azimuth / 180.0 * Math.PI;
double el = Elevation / 180.0 * Math.PI;
Vector3 eye = new Vector3( (float)(center.X + Distance * Math.Sin( az ) * Math.Cos( el )),
(float)(center.Y + Distance * Math.Sin( el )),
(float)(center.Z + Distance * Math.Cos( az ) * Math.Cos( el )) );
Matrix4 modelView = Matrix4.LookAt( eye, center, Vector3.UnitY );
Matrix4 proj;
if ( Perspective )
{
float vv = (float)(2.0 * Math.Atan2( diameter * 0.5, Distance ));
proj = Matrix4.CreatePerspectiveFieldOfView( vv, aspect, 1.0f, 50.0f );
}
else
{
float vHalf = diameter * 0.52f;
proj = Matrix4.CreateOrthographicOffCenter( -vHalf, vHalf,
-vHalf / aspect, vHalf / aspect,
1.0f, 50.0f );
}
compound = Matrix4.Mult( modelView, proj );
Matrix4 viewport = Geometry.SetViewport( 0, 0, width, height );
compound = Matrix4.Mult( compound, viewport );
}
public void Render( Bitmap output, IFunctionR2ToR funct )
{
if ( output == null ||
funct == null ) return;
prepareProjection( output, funct );
// !!!{{ TODO: add the graph rendering code here
Graphics gr = Graphics.FromImage( output );
Pen pen = new Pen( Color.FromArgb( 255, 255, 80 ), 1.0f );
float x, dx, z, dz;
float ax, ay, bx, by;
dx = (float)(funct.MaxX - funct.MinX) / Columns;
dz = (float)(funct.MaxZ - funct.MinZ) / Rows;
z = (float)funct.MinZ;
x = (float)funct.MinX;
for ( int i = 1; i < Columns; i++, x += dx )
{
transform( x, z, out ax, out ay );
transform( x + dx, z, out bx, out by );
gr.DrawLine( pen, ax, ay, bx, by );
}
for ( int j = 1; j < Rows; j++, z += dz )
{
x = (float)funct.MinX;
transform( x, z, out ax, out ay );
transform( x, z + dz, out bx, out by );
gr.DrawLine( pen, ax, ay, bx, by );
for ( int i = 1; i < Columns; i++, x += dx )
{
transform( x, z + dz, out ax, out ay );
transform( x + dx, z + dz, out bx, out by );
gr.DrawLine( pen, ax, ay, bx, by );
transform( x + dx, z, out ax, out ay );
gr.DrawLine( pen, ax, ay, bx, by );
}
}
// !!!}}
}
