public void VectorIndexer()
{
float x = 10f, y = 11f, z = 12f, h = 13f;
var v4 = new Vec4f();
v4 [0] = x;
v4 [1] = y;
v4 [2] = z;
v4 [3] = h;
Assert.AreEqual(x, v4 [0]);
Assert.AreEqual(y, v4 [1]);
Assert.AreEqual(z, v4 [2]);
Assert.AreEqual(h, v4 [3]);
v4 = new Vec4f();
v4.x = x;
v4.y = y;
v4.z = z;
v4.h = h;
Assert.AreEqual(x, v4.x);
Assert.AreEqual(y, v4.y);
Assert.AreEqual(z, v4.z);
Assert.AreEqual(h, v4.h);
}
public static Vec4f Mult(Matrix4 m, Vec4f v)
{
return(new Vec4f {
x = m.R0C0 * v.x + m.R0C1 * v.y + m.R0C2 * v.z + m.R0C3 * v.h,
y = m.R1C0 * v.x + m.R1C1 * v.y + m.R1C2 * v.z + m.R1C3 * v.h,
z = m.R2C0 * v.x + m.R2C1 * v.y + m.R2C2 * v.z + m.R2C3 * v.h,
h = m.R3C0 * v.x + m.R3C1 * v.y + m.R3C2 * v.z + m.R3C3 * v.h
});
}
public void Vector4_Norm()
{
var b4 = new Vec4f {
x = 1, y = 2, z = 3, h = 4
};
var len = b4.Norm();
Assert.True(Math.Abs(Math.Sqrt(30) - len) <= 0.001);
}
public void Project3D()
{
var v4 = new Vec4f {
x = 10, y = 11, z = 12, h = 13
};
var v3 = Geometry.Project3D(v4);
Assert.AreEqual(v4.x, v3.x);
Assert.AreEqual(v4.y, v3.y);
Assert.AreEqual(v4.z, v3.z);
}
public void Vector4_Divide()
{
var v4 = new Vec4f {
x = 10, y = 20, z = 30, h = 40
};
var r4 = v4 / 10;
Assert.AreEqual(1, r4.x);
Assert.AreEqual(2, r4.y);
Assert.AreEqual(3, r4.z);
Assert.AreEqual(4, r4.h);
}
public void Vector4_Normalize()
{
var b4 = new Vec4f {
x = 1, y = 2, z = 3, h = 4
};
var len = b4.Norm();
var n = b4.Normalize();
Assert.True(Math.Abs(n.x - 1f / len) <= 0.001);
Assert.True(Math.Abs(n.y - 2f / len) <= 0.001);
Assert.True(Math.Abs(n.z - 3f / len) <= 0.001);
Assert.True(Math.Abs(n.h - 4f / len) <= 0.001);
}
public void Vector4_Sub()
{
var a4 = new Vec4f {
x = 10, y = 20, z = 30, h = 40
};
var b4 = new Vec4f {
x = 1, y = 2, z = 3, h = 4
};
var r = a4 - b4;
Assert.AreEqual(9, r.x);
Assert.AreEqual(18, r.y);
Assert.AreEqual(27, r.z);
Assert.AreEqual(36, r.h);
}
static RenderResult Render(Model model, IShader shader)
{
var image = new Image(width, height, Format.BGR);
var zbuffer = InitZBuffer(image);
var screen_coords = new Vec4f [3];
foreach (var face in model.Faces)
{
for (int i = 0; i < 3; i++)
{
screen_coords [i] = shader.Vertex(face, i);
}
Triangle(image, screen_coords, shader, zbuffer);
}
return(new RenderResult {
Image = image,
ZBuffer = zbuffer
});
}
public static Vec3f Project3D(Vec4f v)
{
return(new Vec3f {
x = v.x, y = v.y, z = v.z
});
}
public static Vec2f Project2D(Vec4f v)
{
return(new Vec2f {
x = v.x, y = v.y
});
}
static void AmbientListing()
{
var rnd = new Random();
var screen_coords = new Vec4f [3];
var frame = new Image(width, height, Format.BGR);
var shadowbuffer = InitZBuffer(frame);
var zbuffer = InitZBuffer(frame);
var total = new Image(1024, 1024, Format.BGR);
var occl = new Image(1024, 1024, Format.BGR);
const int nrenders = 1;
for (int iter = 1; iter <= nrenders; iter++)
{
for (int i = 0; i < shadowbuffer.Length; i++)
{
shadowbuffer [i] = 0;
zbuffer [i] = 0;
}
var vUp = new Vec3f {
x = (float)rnd.NextDouble(),
y = (float)rnd.NextDouble(),
z = (float)rnd.NextDouble()
};
var spLocation = RandPointOnUnitSphere();
spLocation.y = Math.Abs(spLocation.y);
frame.Clear();
var mvM = LookAt(spLocation, center, vUp);
var pM = Projection(0);
var zshader = new ZShader(diabloModel, viewPort, pM, mvM);
foreach (var face in diabloModel.Faces)
{
for (int i = 0; i < 3; i++)
{
screen_coords [i] = zshader.Vertex(face, i);
}
Triangle(frame, screen_coords, zshader, shadowbuffer);
}
//frame.VerticalFlip ();
//frame.WriteToFile ("framebuffer.tga");
occl.Clear();
var shader = new OcclusionShader(diabloModel, viewPort, pM, mvM, occl, shadowbuffer, frame.Width);
foreach (var face in diabloModel.Faces)
{
for (int i = 0; i < 3; i++)
{
screen_coords [i] = shader.Vertex(face, i);
}
Triangle(frame, screen_coords, shader, zbuffer);
}
for (int i = 0; i < total.Width; i++)
{
for (int j = 0; j < total.Height; j++)
{
float prev = total [i, j] [0];
float curr = occl [i, j] [0];
var val = (byte)((prev * (iter - 1) + curr) / iter + 0.5f);
total [i, j] = new Color(val, val, val);
}
}
}
total.VerticalFlip();
total.WriteToFile("total-occlusion.tga");
}
