public void Vertex()
{
var model = ModelUtils.GetModel1();
var ligthdir = new Vec3f {
z = 3
};
var I = Matrix4.Identity();
//var viewPort = I;
//var projection = I;
//var modelView = I;
var modelView = LookAt(eye, center, up);
var viewPort = Viewport(width / 8, height / 8, width * 3 / 4, height * 3 / 4);
var projection = Projection(-1f / (eye - center).Norm());
var shader = new GouraudShader(model, viewPort, projection, modelView, ligthdir);
var face = model.Faces [0];
var sc0 = shader.Vertex(face, 0);
//sc0 = sc0 / sc0.h;
var sc1 = shader.Vertex(face, 1);
//sc1 = sc1 / sc1.h;
var sc2 = shader.Vertex(face, 2);
//sc2 = sc2 / sc2.h;
Func <Vec3f, Vec3f> map = v => {
var transformation = viewPort * projection * modelView;
var r = Project3D(Mult(transformation, Embed4D(v)));
//r.x = (int)Math.Round (r.x, MidpointRounding.AwayFromZero);
//r.y = (int)Math.Round (r.y, MidpointRounding.AwayFromZero);
return(r);
};
var v0 = model.Vertices [face.Vertices [0]];
var v1 = model.Vertices [face.Vertices [1]];
var v2 = model.Vertices [face.Vertices [2]];
var t0 = map(v0);
var t1 = map(v1);
var t2 = map(v2);
Assert.True(Math.Abs(sc0.x - t0.x) < 0.0001f);
Assert.True(Math.Abs(sc0.y - t0.y) < 0.0001f);
Assert.True(Math.Abs(sc0.z - t0.z) < 0.0001f);
Assert.True(Math.Abs(sc1.x - t1.x) < 0.0001f);
Assert.True(Math.Abs(sc1.y - t1.y) < 0.0001f);
Assert.True(Math.Abs(sc1.z - t1.z) < 0.0001f);
Assert.True(Math.Abs(sc2.x - t2.x) < 0.0001f);
Assert.True(Math.Abs(sc2.y - t2.y) < 0.0001f);
Assert.True(Math.Abs(sc2.z - t2.z) < 0.0001f);
}
static void GouraudShaderListing()
{
var shader = new GouraudShader(headModel, viewPort, projection, modelView, light_dir);
Render(headModel, shader, "gouraud-shader.tga");
}