public void DrawTopTriangle(Vertex v1, Vertex v2, Vertex v3, Scene scene, VertexTriangle vt, VertexTriangle oriVt)
{
Vector4 p1 = v1.ScreenSpacePosition;
Vector4 p2 = v2.ScreenSpacePosition;
Vector4 p3 = v3.ScreenSpacePosition;
Color4 color1 = v1.Color;
Color4 color2 = v2.Color;
Color4 color3 = v3.Color;
float ax = p1.X;
float bx = p2.X;
float cx = p3.X;
float ay = p1.Y;
float by = p2.Y;
float cy = p3.Y;
float az = p1.Z;
float bz = p2.Z;
float cz = p3.Z;
Vector4 normal1 = v1.nowNormal;
Vector4 normal2 = v2.nowNormal;
Vector4 normal3 = v3.nowNormal;
oriVt.PreCalWeight();
if (bx == cx)
{
for (int y = (int)ay; y <= (int)cy; y++)
{
float y1 = (float)(y - ay) / (float)(cy - ay);
float y2 = (float)(y - by) / (float)(cy - by);
y1 = MathUtil.Clamp01(y1);
y2 = MathUtil.Clamp01(y2);
int x0 = (int)MathUtil.Interp(ax, cx, y1);
int x1 = (int)bx;
float z1 = MathUtil.Interp(az, cz, y1);
float z2 = bz;
Color4 c1 = new Color4();
Color4 c2 = new Color4();
if (scene.renderState == Scene.RenderState.GouraduShading)
{
c1 = MathUtil.ColorInterp(color1, color3, y1);
c2 = MathUtil.ColorInterp(color2, color3, y2);
}
Vector4 n1 = new Vector4(0, 0, 0, 0);
Vector4 n2 = new Vector4(0, 0, 0, 0);
if (DirectionLight.IsEnable)
{
n1 = MathUtil.Vector4Interp(normal1, normal3, y1);
n2 = MathUtil.Vector4Interp(normal2, normal3, y2);
}
for (int x = x0; x <= x1; x++)
{
float r3 = (float)(x - x0) / (float)(x1 - x0);
r3 = MathUtil.Clamp01(r3);
float z = MathUtil.Interp(z1, z2, r3);
Vector4 pos = new Vector4(x, y, z, 0);
switch (scene.renderState)
{
case Scene.RenderState.WireFrame:
{ }
break;
case Scene.RenderState.GouraduShading:
{
oriVt.CalWeight(pos);
Color4 c3 = MathUtil.ColorInterp(c1, c2, r3);
if (DirectionLight.IsEnable)
{
Vector4 n3 = MathUtil.Vector4Interp(n1, n2, r3);
n3 = oriVt.GetNormal();
final = DirectionLight.GetFinalLightColor(n3, c3);
}
else
{
final = c3;
}
}
break;
case Scene.RenderState.TextureMapping:
{
oriVt.CalWeight(pos);
Vector4 n3 = MathUtil.Vector4Interp(n1, n2, r3);
Vector4 uv = oriVt.GetInterUV();
if (DirectionLight.IsEnable)
{
Color4 c = device.Tex2D(uv.X, uv.Y, scene.mesh.texture);
n3 = oriVt.GetNormal();
final = DirectionLight.GetFinalLightColor(n3, c);
}
else
{
final = device.Tex2D(uv.X, uv.Y, scene.mesh.texture);
}
}
break;
}
device.DrawPoint(pos, final);
}
}
}
else if (ax == cx)
{
for (int y = (int)ay; y <= (int)cy; y++)
{
float y1 = (float)(y - ay) / (float)(cy - ay);
float y2 = (float)(y - by) / (float)(cy - by);
y1 = MathUtil.Clamp01(y1);
y2 = MathUtil.Clamp01(y2);
int x0 = (int)ax;
int x1 = (int)MathUtil.Interp(bx, cx, y2);
float z1 = MathUtil.Interp(az, cz, y1);
float z2 = MathUtil.Interp(bz, cz, y2);
Color4 c1 = new Color4();
Color4 c2 = new Color4();
if (scene.renderState == Scene.RenderState.GouraduShading)
{
c1 = MathUtil.ColorInterp(color1, color3, y1);
c2 = MathUtil.ColorInterp(color2, color3, y2);
}
Vector4 n1 = new Vector4(0, 0, 0, 0);
Vector4 n2 = new Vector4(0, 0, 0, 0);
if (DirectionLight.IsEnable)
{
n1 = MathUtil.Vector4Interp(normal1, normal3, y1);
n2 = MathUtil.Vector4Interp(normal2, normal3, y2);
}
for (int x = x0; x < x1; x++)
{
float r3 = (float)(x - x0) / (float)(x1 - x0);
r3 = MathUtil.Clamp01(r3);
float z = MathUtil.Interp(z1, z2, r3);
Vector4 pos = new Vector4(x, y, z, 0);
switch (scene.renderState)
{
case Scene.RenderState.WireFrame:
{ }
break;
case Scene.RenderState.GouraduShading:
{
oriVt.CalWeight(pos);
Color4 c3 = MathUtil.ColorInterp(c1, c2, r3);
if (DirectionLight.IsEnable)
{
Vector4 n3 = MathUtil.Vector4Interp(n1, n2, r3);
n3 = oriVt.GetNormal();
final = DirectionLight.GetFinalLightColor(n3, c3);
}
else
{
final = c3;
}
}
break;
case Scene.RenderState.TextureMapping:
{
oriVt.CalWeight(pos);
Vector4 n3 = MathUtil.Vector4Interp(n1, n2, r3);
Vector4 uv = oriVt.GetInterUV();
if (DirectionLight.IsEnable)
{
Color4 c = device.Tex2D(uv.X, uv.Y, scene.mesh.texture);
n3 = oriVt.GetNormal();
final = DirectionLight.GetFinalLightColor(n3, c);
}
else
{
final = device.Tex2D(uv.X, uv.Y, scene.mesh.texture);
}
}
break;
}
device.DrawPoint(pos, final);
}
}
}
else
{
for (int y = (int)ay; y <= cy; y++)
{
float y1 = (float)(y - ay) / (float)(cy - ay);
y1 = MathUtil.Clamp01(y1);
float y2 = (y - by) / (cy - by);
y2 = MathUtil.Clamp01(y2);
float x0 = (int)MathUtil.Interp(ax, cx, y1);
float x1 = (int)MathUtil.Interp(bx, cx, y2);
float z1 = MathUtil.Interp(az, cz, y1);
float z2 = MathUtil.Interp(bz, cz, y2);
Color4 c1 = new Color4();
Color4 c2 = new Color4();
if (scene.renderState == Scene.RenderState.GouraduShading)
{
c1 = MathUtil.ColorInterp(color1, color3, y1);
c2 = MathUtil.ColorInterp(color2, color3, y2);
}
Vector4 n1 = new Vector4(0, 0, 0, 0);
Vector4 n2 = new Vector4(0, 0, 0, 0);
if (DirectionLight.IsEnable)
{
n1 = MathUtil.Vector4Interp(normal1, normal3, y1);
n2 = MathUtil.Vector4Interp(normal2, normal3, y2);
}
for (float x = x0; x < x1; x++)
{
float r3 = (float)(x - x0) / (float)(x1 - x0);
r3 = MathUtil.Clamp01(r3);
float z = MathUtil.Interp(z1, z2, r3);
//Color4 c3 = MathUtil.ColorInterp(c1, c2, r3);
Vector4 pos = new Vector4(x, y, z, 0);
switch (scene.renderState)
{
case Scene.RenderState.WireFrame:
{ }
break;
case Scene.RenderState.GouraduShading:
{
Color4 c3 = MathUtil.ColorInterp(c1, c2, r3);
oriVt.CalWeight(pos);
if (DirectionLight.IsEnable)
{
Vector4 n3 = MathUtil.Vector4Interp(n1, n2, r3);
n3 = oriVt.GetNormal();
final = DirectionLight.GetFinalLightColor(n3, c3);
}
else
{
final = c3;
}
}
break;
case Scene.RenderState.TextureMapping:
{
oriVt.CalWeight(pos);
Vector4 n3 = MathUtil.Vector4Interp(n1, n2, r3);
Vector4 uv = oriVt.GetInterUV();
if (DirectionLight.IsEnable)
{
Color4 c = device.Tex2D(uv.X, uv.Y, scene.mesh.texture);
n3 = oriVt.GetNormal();
final = DirectionLight.GetFinalLightColor(n3, c);
}
else
{
final = device.Tex2D(uv.X, uv.Y, scene.mesh.texture);
}
}
break;
}
device.DrawPoint(pos, final);
}
}
}
}
