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Some progress on the gradiation rectangles. I messed up the vector calculation somehow. Is someone good at maths ?

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@301 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Adrien Destugues
2008-10-22 19:56:30 +00:00
parent 08f0541f11
commit cef61562d0
5 changed files with 112 additions and 70 deletions
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37
graph.c
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@@ -5174,7 +5174,44 @@ void Tracer_ellipse_degradee(short Centre_X,short Centre_Y,short Rayon_horizonta
}
// Tracé d'un rectangle (RAX RAY - RBX RBY) dégradé selon le vecteur (VAX VAY - VBX - VBY)
void Tracer_rectangle_degrade(short RAX,short RAY,short RBX,short RBY,short VAX,short VAY, short VBX, short VBY)
{
short Pos_Y, Pos_X;
// On commence par s'assurer que le rectangle est à l'endroit
if(RBX < RAX)
{
Pos_X = RBX;
RBX = RAX;
RAX = Pos_X;
}
if(RBY < RAY)
{
Pos_Y = RBY;
RBY = RAY;
RAY = Pos_Y;
}
Degrade_Intervalle_total = sqrt(pow(VBY - VAY,2)+pow(VBX - VAX,2));
short a = (VBY - VAY)/(VBX - VAX);
short b = a * VAX - VAY;
short Distance_X, Distance_Y;
for (Pos_Y=RAY;Pos_Y<RBY;Pos_Y++)
for (Pos_X = RAX;Pos_X<RBX;Pos_X++)
{
// On calcule ou on en est dans le dégradé
Distance_X = VAX - ((Pos_X - a*b + a*Pos_Y) / (1+a*a));
Distance_Y = VAY - (b + a*(Pos_X - b + a * Pos_Y) / (1+a*a));
Traiter_degrade(sqrt(Distance_X*Distance_X + Distance_Y*Distance_Y),Pos_X,Pos_Y);
}
Mettre_Ecran_A_Jour(RAX,RAY,RBX,RBY);
}