static void printLine(Color8 color, int x0, int y0, int x1, int y1)
{
int dx = Math.Abs(x1 - x0);
int sx = x0 < x1 ? 1 : -1;
int dy = Math.Abs(y1 - y0);
int sy = y0 < y1 ? 1 : -1;
int err = (dx > dy ? dx : -dy) / 2;
int e2;
for (; ;)
{
print('*', x0, y0, color);
if (x0 == x1 && y0 == y1)
{
break;
}
e2 = err;
if (e2 > -dx)
{
err -= dy;
x0 += sx;
}
if (e2 < dy)
{
err += dx;
y0 += sy;
}
}
}
public static System.ConsoleColor FromColor(Color8 c)
{
int index = (c.R > 128 | c.G > 128 | c.B > 128) ? 8 : 0; // Bright bit
index |= (c.R > 64) ? 4 : 0; // Red bit
index |= (c.G > 64) ? 2 : 0; // Green bit
index |= (c.B > 64) ? 1 : 0; // Blue bit
return((System.ConsoleColor)index);
}
static void clearScreen(Color8[,] buf, float[,] zbuff)
{
for (int y = 25; y != 0; --y)
{
for (int x = 80; x != 0; --x)
{
buf[x - 1, y - 1] = new Color8(0, 0, 0);
}
}
}
static void printLine(Color8[,] buf, float[,] zbuff, int x0, int y0, int x1, int y1, Color8 color)
{
int dx = Math.Abs(x1 - x0);
int sx = x0 < x1 ? 1 : -1;
int dy = Math.Abs(y1 - y0);
int sy = y0 < y1 ? 1 : -1;
int err = (dx > dy ? dx : -dy) / 2;
int e2;
for (; ;)
{
if (x0 >= buf.GetLength(0) || y0 >= buf.GetLength(1) || x0 < 0 || y0 < 0)
{
break;
}
buf[x0, y0] = color;
if (x0 == x1 && y0 == y1)
{
break;
}
e2 = err;
if (e2 > -dx)
{
err -= dy;
x0 += sx;
}
if (e2 < dy)
{
err += dx;
y0 += sy;
}
}
}
static void print(Char c, float x, float y, Color8 color)
{
Console.SetCursorPosition((int)x, (int)y);
Console.ForegroundColor = Color8.FromColor(color);
Console.Write(c);
}
static void print(Char c, int x, int y, Color8 color)
{
Console.SetCursorPosition(x, y);
Console.ForegroundColor = Color8.FromColor(color);
Console.Write(c);
}
static void Main(string[] args)
{
MilkShapeObject obj = new MilkShapeObject();
//obj.LoadFromFile("triangle.ms3d");
//obj.LoadFromFile("cube.ms3d");
obj.LoadFromFile("tree.ms3d");
//obj.LoadFromFile("doom.ms3d");
Color8[,] screen = new Color8[80, 25];
float[,] zbuffer = new float[80, 25];
float angle = 0.0f;
while (true)
{
clearScreen(screen, zbuffer);
Mat4 model = new Mat4(
new Vec4(1.0f, 0.0f, 0.0f, 0.0f),
new Vec4(0.0f, 1.0f, 0.0f, 0.0f),
new Vec4(0.0f, 0.0f, 1.0f, 0.0f),
new Vec4(0.0f, 0.0f, 0.0f, 1.0f)
);
model = model * Mat4.RotationYMatrix(angle);
Mat4 view = new Mat4(
new Vec4(1.0f, 0.0f, 0.0f, 0.0f),
new Vec4(0.0f, 1.0f, 0.0f, 0.0f),
new Vec4(0.0f, 0.0f, 1.0f, 0.0f),
new Vec4(0.0f, -30.0f, 70.0f, 1.0f)
);
Mat4 modelView = model * view;
Mat4 proj = Mat4.ProjectionMatrix4(60.0f, 0.1f, 1000.0f);
int numTriangles = obj.arrTriangles.Count;
for (int i = 0; i < numTriangles; ++i)
{
float x1 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[0]].vertex[0];
float y1 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[0]].vertex[1];
float z1 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[0]].vertex[2];
Vec4 point1 = modelView * new Vec4(x1, y1, z1, 0.0f);
point1 = proj * point1;
point1.x = (point1.x + 1.0f) / 2.0f * 80.0f;
point1.y = (point1.y + 1.0f) / 2.0f * 25.0f;
float x2 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[1]].vertex[0];
float y2 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[1]].vertex[1];
float z2 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[1]].vertex[2];
Vec4 point2 = modelView * new Vec4(x2, y2, z2, 0.0f);
point2 = proj * point2;
point2.x = (point2.x + 1.0f) / 2.0f * 80.0f;
point2.y = (point2.y + 1.0f) / 2.0f * 25.0f;
float x3 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[2]].vertex[0];
float y3 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[2]].vertex[1];
float z3 = obj.arrVertices[obj.arrTriangles[i].vertexIndices[2]].vertex[2];
Vec4 point3 = modelView * new Vec4(x3, y3, z3, 0.0f);
point3 = proj * point3;
point3.x = (point3.x + 1.0f) / 2.0f * 80.0f;
point3.y = (point3.y + 1.0f) / 2.0f * 25.0f;
printLine(screen, zbuffer,
(int)point1.x,
(int)point1.y,
(int)point2.x,
(int)point2.y,
new Color8(255, 255, 255)
);
printLine(screen, zbuffer,
(int)point2.x,
(int)point2.y,
(int)point3.x,
(int)point3.y,
new Color8(255, 255, 255)
);
printLine(screen, zbuffer,
(int)point3.x,
(int)point3.y,
(int)point1.x,
(int)point1.y,
new Color8(255, 255, 255)
);
}
render(screen, zbuffer);
angle += (float)(Math.PI / 32.0f);
}
Console.ReadKey();
}
