public void FillTriangle(Vertex v1, Vertex v2, Vertex v3)
{
Matrix4f screenSpaceTransform =
new Matrix4f().InitScreenSpaceTransform(backBuffer.Width/2, backBuffer.Height/2);
Vertex minYVert = v1.Transform(screenSpaceTransform).PerspectiveDivide();
Vertex midYVert = v2.Transform(screenSpaceTransform).PerspectiveDivide();
Vertex maxYVert = v3.Transform(screenSpaceTransform).PerspectiveDivide();
if(maxYVert.GetY() < midYVert.GetY())
{
Vertex temp = maxYVert;
maxYVert = midYVert;
midYVert = temp;
}
if(midYVert.GetY() < minYVert.GetY())
{
Vertex temp = midYVert;
midYVert = minYVert;
minYVert = temp;
}
if(maxYVert.GetY() < midYVert.GetY())
{
Vertex temp = maxYVert;
maxYVert = midYVert;
midYVert = temp;
}
float area = minYVert.TriangleAreaTimes2(maxYVert, midYVert);
int handedness = area >= 0 ? 1 : 0;
ScanConvertTriangle(minYVert, midYVert, maxYVert, handedness);
FillShape((int)minYVert.GetY(), (int)maxYVert.GetY());
}
public Matrix4f InitRotation(float x, float y, float z)
{
Matrix4f rx = new Matrix4f();
Matrix4f ry = new Matrix4f();
Matrix4f rz = new Matrix4f();
rz.m[0, 0] = (float)Math.Cos(z); rz.m[0, 1] = -(float)Math.Sin(z); rz.m[0, 2] = 0; rz.m[0, 3] = 0;
rz.m[1, 0] = (float)Math.Sin(z); rz.m[1, 1] = (float)Math.Cos(z); rz.m[1, 2] = 0; rz.m[1, 3] = 0;
rz.m[2, 0] = 0; rz.m[2, 1] = 0; rz.m[2, 2] = 1; rz.m[2, 3] = 0;
rz.m[3, 0] = 0; rz.m[3, 1] = 0; rz.m[3, 2] = 0; rz.m[3, 3] = 1;
rx.m[0, 0] = 1; rx.m[0, 1] = 0; rx.m[0, 2] = 0; rx.m[0, 3] = 0;
rx.m[1, 0] = 0; rx.m[1, 1] = (float)Math.Cos(x); rx.m[1, 2] = -(float)Math.Sin(x); rx.m[1, 3] = 0;
rx.m[2, 0] = 0; rx.m[2, 1] = (float)Math.Sin(x); rx.m[2, 2] = (float)Math.Cos(x); rx.m[2, 3] = 0;
rx.m[3, 0] = 0; rx.m[3, 1] = 0; rx.m[3, 2] = 0; rx.m[3, 3] = 1;
ry.m[0, 0] = (float)Math.Cos(y); ry.m[0, 1] = 0; ry.m[0, 2] = -(float)Math.Sin(y); ry.m[0, 3] = 0;
ry.m[1, 0] = 0; ry.m[1, 1] = 1; ry.m[1, 2] = 0; ry.m[1, 3] = 0;
ry.m[2, 0] = (float)Math.Sin(y); ry.m[2, 1] = 0; ry.m[2, 2] = (float)Math.Cos(y); ry.m[2, 3] = 0;
ry.m[3, 0] = 0; ry.m[3, 1] = 0; ry.m[3, 2] = 0; ry.m[3, 3] = 1;
m = rz.Mul(ry.Mul(rx)).GetM();
return(this);
}
private void RenderGame()
{
target.BeginRender();
target.Clear();
rotCounter += (float)timeDelta;
Matrix4f translation = new Matrix4f().InitTranslation(0.0f, 0.0f, 3.0f);
Matrix4f rotation = new Matrix4f().InitRotation(0.0f, rotCounter, 0.0f);
Matrix4f transform = projection.Mul(translation.Mul(rotation));
target.FillTriangle(maxYVert.Transform(transform), midYVert.Transform(transform), minYVert.Transform(transform));
target.EndRender();
Refresh();
}
public Form1()
{
InitializeComponent();
Application.Idle += HandleApplicaitonIdle;
backBuffer = new Bitmap(Width, Height);
target = new RenderContext(backBuffer); // set render target bitmap backbuffer
previousTime = DateTime.Now;
frameCount = 0;
rotCounter = 0.0f;
projection = new Matrix4f().InitPerspective((float)Math.PI / 2.0f, (float)(Width / Height), 0.1f, 1000.0f);
}
public Form1()
{
InitializeComponent();
Application.Idle += HandleApplicaitonIdle;
backBuffer = new Bitmap(Width, Height);
target = new RenderContext(backBuffer); // set render target bitmap backbuffer
previousTime = DateTime.Now;
frameCount = 0;
rotCounter = 0.0f;
projection = new Matrix4f().InitPerspective((float)Math.PI / 2.0f, (float)(Width / Height), 0.1f, 1000.0f);
}
public Matrix4f Mul(Matrix4f r)
{
Matrix4f res = new Matrix4f();
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
res.Set(i, j, m[i, 0] * r.Get(0, j) +
m[i, 1] * r.Get(1, j) +
m[i, 2] * r.Get(2, j) +
m[i, 3] * r.Get(3, j));
}
}
return(res);
}
public void FillTriangle(Vertex v1, Vertex v2, Vertex v3)
{
Matrix4f screenSpaceTransform =
new Matrix4f().InitScreenSpaceTransform(backBuffer.Width / 2, backBuffer.Height / 2);
Vertex minYVert = v1.Transform(screenSpaceTransform).PerspectiveDivide();
Vertex midYVert = v2.Transform(screenSpaceTransform).PerspectiveDivide();
Vertex maxYVert = v3.Transform(screenSpaceTransform).PerspectiveDivide();
if (maxYVert.GetY() < midYVert.GetY())
{
Vertex temp = maxYVert;
maxYVert = midYVert;
midYVert = temp;
}
if (midYVert.GetY() < minYVert.GetY())
{
Vertex temp = midYVert;
midYVert = minYVert;
minYVert = temp;
}
if (maxYVert.GetY() < midYVert.GetY())
{
Vertex temp = maxYVert;
maxYVert = midYVert;
midYVert = temp;
}
float area = minYVert.TriangleAreaTimes2(maxYVert, midYVert);
int handedness = area >= 0 ? 1 : 0;
ScanConvertTriangle(minYVert, midYVert, maxYVert, handedness);
FillShape((int)minYVert.GetY(), (int)maxYVert.GetY());
}
public Matrix4f InitRotation(float x, float y, float z)
{
Matrix4f rx = new Matrix4f();
Matrix4f ry = new Matrix4f();
Matrix4f rz = new Matrix4f();
rz.m[0, 0] = (float)Math.Cos(z);rz.m[0, 1] = -(float)Math.Sin(z);rz.m[0, 2] = 0; rz.m[0, 3] = 0;
rz.m[1, 0] = (float)Math.Sin(z);rz.m[1, 1] = (float)Math.Cos(z);rz.m[1, 2] = 0; rz.m[1, 3] = 0;
rz.m[2, 0] = 0; rz.m[2, 1] = 0; rz.m[2, 2] = 1; rz.m[2, 3] = 0;
rz.m[3, 0] = 0; rz.m[3, 1] = 0; rz.m[3, 2] = 0; rz.m[3, 3] = 1;
rx.m[0, 0] = 1; rx.m[0, 1] = 0; rx.m[0, 2] = 0; rx.m[0, 3] = 0;
rx.m[1, 0] = 0; rx.m[1, 1] = (float)Math.Cos(x);rx.m[1, 2] = -(float)Math.Sin(x);rx.m[1, 3] = 0;
rx.m[2, 0] = 0; rx.m[2, 1] = (float)Math.Sin(x);rx.m[2, 2] = (float)Math.Cos(x);rx.m[2, 3] = 0;
rx.m[3, 0] = 0; rx.m[3, 1] = 0; rx.m[3, 2] = 0; rx.m[3, 3] = 1;
ry.m[0, 0] = (float)Math.Cos(y);ry.m[0, 1] = 0; ry.m[0, 2] = -(float)Math.Sin(y);ry.m[0, 3] = 0;
ry.m[1, 0] = 0; ry.m[1, 1] = 1; ry.m[1, 2] = 0; ry.m[1, 3] = 0;
ry.m[2, 0] = (float)Math.Sin(y);ry.m[2, 1] = 0; ry.m[2, 2] = (float)Math.Cos(y);ry.m[2, 3] = 0;
ry.m[3, 0] = 0; ry.m[3, 1] = 0; ry.m[3, 2] = 0; ry.m[3, 3] = 1;
m = rz.Mul(ry.Mul(rx)).GetM();
return this;
}
public Matrix4f Mul(Matrix4f r)
{
Matrix4f res = new Matrix4f();
for(int i = 0; i < 4; i++)
{
for(int j = 0; j < 4; j++)
{
res.Set(i, j, m[i, 0] * r.Get(0, j) +
m[i, 1] * r.Get(1, j) +
m[i, 2] * r.Get(2, j) +
m[i, 3] * r.Get(3, j));
}
}
return res;
}
public Vertex Transform(Matrix4f transform)
{
return(new Vertex(transform.Transform(m_pos)));
}
private void RenderGame()
{
target.BeginRender();
target.Clear();
rotCounter += (float)timeDelta;
Matrix4f translation = new Matrix4f().InitTranslation(0.0f, 0.0f, 3.0f);
Matrix4f rotation = new Matrix4f().InitRotation(0.0f, rotCounter, 0.0f);
Matrix4f transform = projection.Mul(translation.Mul(rotation));
target.FillTriangle(maxYVert.Transform(transform), midYVert.Transform(transform), minYVert.Transform(transform));
target.EndRender();
Refresh();
}
public Vertex Transform(Matrix4f transform)
{
return new Vertex(transform.Transform(m_pos));
}
