private void Form1_Load(object sender, EventArgs e)
{
tester.INIT();
backbuffer = new byte[img.Width, img.Height, 3];
tester[0] = new Utils.Vec(new double[] { 20, 20, 0 });
tester[1] = new Utils.Vec(new double[] { 170, 70, 127 });
tester[2] = new Utils.Vec(new double[] { 70, 170, 255 });
GameLoop();
}
public void Fill()
{
Utils.Vec p1 = this[0];
Utils.Vec p2 = this[1];
Utils.Vec p3 = this[2];
Utils.Vec t = p3;
if (p3.y < p2.y)
{
p3 = p2;
p2 = t;
}
if (p2.y < p1.y)
{
t = p2;
p2 = p1;
p1 = t;
}
if (p3.y < p2.y)
{
t = p3;
p3 = p2;
p2 = t;
}
double q = 0;
double p = 0;
double dy1 = p2.y - p1.y;
double dy2 = p3.y - p1.y;
double dy3 = p3.y - p2.y;
if (p1.y != p2.y)
{
for (int y = (int)p1.y; y <= (int)p2.y; y++)
{
double ay1 = (y - p1.y) / dy1;
double ay2 = (y - p1.y) / dy2;
double x1 = (1 - ay1) * p1.x + ay1 * p2.x;
double x2 = (1 - ay2) * p1.x + ay2 * p3.x;
q = Math.Min(x1, x2);
p = Math.Max(x1, x2);
x1 = q;
x2 = p;
double z1 = (1 - ay1) * p1.z + ay1 * p2.z;
double z2 = (1 - ay2) * p1.z + ay2 * p3.z;
double dx = x2 - x1;
for (int x = (int)x1; x <= (int)x2; x++)
{
double ax = (x - x1) * (1 / dx);
double z = 255 - ((1 - ax) * z1 + ax * z2);
backbuffer[x, y, 0] = (byte)z;
backbuffer[x, y, 1] = (byte)z;
backbuffer[x, y, 2] = (byte)z;
}
}
}
if (p2.y != p3.y)
{
for (int y = (int)p2.y; y <= (int)p3.y; y++)
{
double ay1 = (y - p2.y) / dy3;
double ay2 = (y - p1.y) / dy2;
double x1 = (1 - ay1) * p2.x + ay1 * p3.x;
double x2 = (1 - ay2) * p1.x + ay2 * p3.x;
q = Math.Min(x1, x2);
p = Math.Max(x1, x2);
x1 = q;
x2 = p;
double z1 = (1 - ay1) * p2.z + ay1 * p3.z;
double z2 = (1 - ay2) * p1.z + ay2 * p3.z;
double dx = x2 - x1;
for (int x = (int)x1; x <= (int)x2; x++)
{
double ax = (x - x1) * (1 / dx);
double z = 255 - ((1 - ax) * z1 + ax * z2);
backbuffer[x, y, 0] = (byte)z;
backbuffer[x, y, 1] = (byte)z;
backbuffer[x, y, 2] = (byte)z;
}
}
}
}