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Rope: Preliminary collision with landscape

rope
Armin Burgmeier 2012-04-28 13:54:40 +02:00
parent 6cf22b7d22
commit 1ef0f3ce41
1 changed files with 37 additions and 3 deletions
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40
src/game/object/C4Rope.cpp
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@ -48,11 +48,45 @@ void C4RopeSegment::Execute(C4Real dt)
{
vx += dt * fx / m;
vy += dt * fy / m;
//if(vx*vx + vy*vy > 0)//itofix(1,10000))
{
int old_x = fixtoi(x);
int old_y = fixtoi(y);
int new_x = fixtoi(x + dt * vx);
int new_y = fixtoi(y + dt * vy);
int max_p = Max(abs(new_x - old_x), abs(new_y - old_y));
// TODO: Collision detection
int prev_x = old_x;
int prev_y = old_y;
bool hit = false;
for(int i = 1; i <= max_p; ++i)
{
int inter_x = old_x + i * (new_x - old_x) / max_p;
int inter_y = old_y + i * (new_y - old_y) / max_p;
if(GBackSolid(inter_x, inter_y))
{
/*if(inter_x != old_x)*/ x = prev_x;
/*if(inter_y != old_y)*/ y = prev_y;
hit = true;
x += dt * vx;
y += dt * vy;
// TODO: friction, v redirection
vx = Fix0;
vy = Fix0;
break;
}
prev_x = inter_x;
prev_y = inter_y;
}
if(!hit)
{
x += dt * vx;
y += dt * vy;
}
}
fx = fy = Fix0;
}