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Factor PlanMove out of Simulation::UpdateParticles

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This will be useful later for a debug feature I'm planning to add.
This commit is contained in:
Tamás Bálint Misius 2023-10-22 10:41:21 +02:00
parent edcbeaca56
commit ac99fb8a11
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2 changed files with 131 additions and 88 deletions
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208
src/simulation/Simulation.cpp
View File

@ -1090,7 +1090,7 @@ void Simulation::clear_sim(void)
SetEdgeMode(edgeMode);
}
bool Simulation::IsWallBlocking(int x, int y, int type)
bool Simulation::IsWallBlocking(int x, int y, int type) const
{
if (bmap[y/CELL][x/CELL])
{
@ -1258,7 +1258,7 @@ void Simulation::init_can_move()
0 = No move/Bounce
2 = Both particles occupy the same space.
*/
int Simulation::eval_move(int pt, int nx, int ny, unsigned *rr)
int Simulation::eval_move(int pt, int nx, int ny, unsigned *rr) const
{
unsigned r;
int result;
@ -2227,6 +2227,115 @@ void Simulation::delete_part(int x, int y)//calls kill_part with the particle lo
kill_part(ID(i));
}
Simulation::PlanMoveResult Simulation::PlanMove(int i, int x, int y, bool update_emap)
{
// This function would be const if not for calling set_emap if update_emap is true,
// and users of this function *expect* it to be const if update_emap is false. So
// whenever you change something here, make sure it compiles *as const* if you
// remove the set_emap call.
auto t = parts[i].type;
int fin_x, fin_y, clear_x, clear_y;
float fin_xf, fin_yf, clear_xf, clear_yf;
auto vx = parts[i].vx;
auto vy = parts[i].vy;
auto mv = fmaxf(fabsf(vx), fabsf(vy));
if (mv < ISTP)
{
clear_x = x;
clear_y = y;
clear_xf = parts[i].x;
clear_yf = parts[i].y;
fin_xf = clear_xf + vx;
fin_yf = clear_yf + vy;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
}
else
{
if (mv > MAX_VELOCITY)
{
vx *= MAX_VELOCITY/mv;
vy *= MAX_VELOCITY/mv;
mv = MAX_VELOCITY;
}
// interpolate to see if there is anything in the way
auto dx = vx*ISTP/mv;
auto dy = vy*ISTP/mv;
fin_xf = parts[i].x;
fin_yf = parts[i].y;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
bool closedEholeStart = InBounds(fin_x, fin_y) && (bmap[fin_y/CELL][fin_x/CELL] == WL_EHOLE && !emap[fin_y/CELL][fin_x/CELL]);
while (1)
{
mv -= ISTP;
fin_xf += dx;
fin_yf += dy;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
if (edgeMode == EDGE_LOOP)
{
bool x_ok = (fin_xf >= CELL-.5f && fin_xf < XRES-CELL-.5f);
bool y_ok = (fin_yf >= CELL-.5f && fin_yf < YRES-CELL-.5f);
if (!x_ok)
fin_xf = remainder_p(fin_xf-CELL+.5f, XRES-CELL*2.0f)+CELL-.5f;
if (!y_ok)
fin_yf = remainder_p(fin_yf-CELL+.5f, YRES-CELL*2.0f)+CELL-.5f;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
}
if (mv <= 0.0f)
{
// nothing found
fin_xf = parts[i].x + vx;
fin_yf = parts[i].y + vy;
if (edgeMode == EDGE_LOOP)
{
bool x_ok = (fin_xf >= CELL-.5f && fin_xf < XRES-CELL-.5f);
bool y_ok = (fin_yf >= CELL-.5f && fin_yf < YRES-CELL-.5f);
if (!x_ok)
fin_xf = remainder_p(fin_xf-CELL+.5f, XRES-CELL*2.0f)+CELL-.5f;
if (!y_ok)
fin_yf = remainder_p(fin_yf-CELL+.5f, YRES-CELL*2.0f)+CELL-.5f;
}
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
clear_xf = fin_xf-dx;
clear_yf = fin_yf-dy;
clear_x = (int)(clear_xf+0.5f);
clear_y = (int)(clear_yf+0.5f);
break;
}
//block if particle can't move (0), or some special cases where it returns 1 (can_move = 3 but returns 1 meaning particle will be eaten)
//also photons are still blocked (slowed down) by any particle (even ones it can move through), and absorb wall also blocks particles
int eval = eval_move(t, fin_x, fin_y, NULL);
if (!eval || (can_move[t][TYP(pmap[fin_y][fin_x])] == 3 && eval == 1) || (t == PT_PHOT && pmap[fin_y][fin_x]) || bmap[fin_y/CELL][fin_x/CELL]==WL_DESTROYALL || closedEholeStart!=(bmap[fin_y/CELL][fin_x/CELL] == WL_EHOLE && !emap[fin_y/CELL][fin_x/CELL]))
{
// found an obstacle
clear_xf = fin_xf-dx;
clear_yf = fin_yf-dy;
clear_x = (int)(clear_xf+0.5f);
clear_y = (int)(clear_yf+0.5f);
break;
}
if (update_emap && bmap[fin_y/CELL][fin_x/CELL]==WL_DETECT && emap[fin_y/CELL][fin_x/CELL]<8)
set_emap(fin_x/CELL, fin_y/CELL);
}
}
return {
fin_x,
fin_y,
clear_x,
clear_y,
fin_xf,
fin_yf,
clear_xf,
clear_yf,
vx,
vy,
};
}
void Simulation::UpdateParticles(int start, int end)
{
//the main particle loop function, goes over all particles.
@ -2868,90 +2977,17 @@ killed:
int fin_x, fin_y, clear_x, clear_y;
float fin_xf, fin_yf, clear_xf, clear_yf;
{
auto mv = fmaxf(fabsf(parts[i].vx), fabsf(parts[i].vy));
if (mv < ISTP)
{
clear_x = x;
clear_y = y;
clear_xf = parts[i].x;
clear_yf = parts[i].y;
fin_xf = clear_xf + parts[i].vx;
fin_yf = clear_yf + parts[i].vy;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
}
else
{
if (mv > MAX_VELOCITY)
{
parts[i].vx *= MAX_VELOCITY/mv;
parts[i].vy *= MAX_VELOCITY/mv;
mv = MAX_VELOCITY;
}
// interpolate to see if there is anything in the way
auto dx = parts[i].vx*ISTP/mv;
auto dy = parts[i].vy*ISTP/mv;
fin_xf = parts[i].x;
fin_yf = parts[i].y;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
bool closedEholeStart = InBounds(fin_x, fin_y) && (bmap[fin_y/CELL][fin_x/CELL] == WL_EHOLE && !emap[fin_y/CELL][fin_x/CELL]);
while (1)
{
mv -= ISTP;
fin_xf += dx;
fin_yf += dy;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
if (edgeMode == EDGE_LOOP)
{
bool x_ok = (fin_xf >= CELL-.5f && fin_xf < XRES-CELL-.5f);
bool y_ok = (fin_yf >= CELL-.5f && fin_yf < YRES-CELL-.5f);
if (!x_ok)
fin_xf = remainder_p(fin_xf-CELL+.5f, XRES-CELL*2.0f)+CELL-.5f;
if (!y_ok)
fin_yf = remainder_p(fin_yf-CELL+.5f, YRES-CELL*2.0f)+CELL-.5f;
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
}
if (mv <= 0.0f)
{
// nothing found
fin_xf = parts[i].x + parts[i].vx;
fin_yf = parts[i].y + parts[i].vy;
if (edgeMode == EDGE_LOOP)
{
bool x_ok = (fin_xf >= CELL-.5f && fin_xf < XRES-CELL-.5f);
bool y_ok = (fin_yf >= CELL-.5f && fin_yf < YRES-CELL-.5f);
if (!x_ok)
fin_xf = remainder_p(fin_xf-CELL+.5f, XRES-CELL*2.0f)+CELL-.5f;
if (!y_ok)
fin_yf = remainder_p(fin_yf-CELL+.5f, YRES-CELL*2.0f)+CELL-.5f;
}
fin_x = (int)(fin_xf+0.5f);
fin_y = (int)(fin_yf+0.5f);
clear_xf = fin_xf-dx;
clear_yf = fin_yf-dy;
clear_x = (int)(clear_xf+0.5f);
clear_y = (int)(clear_yf+0.5f);
break;
}
//block if particle can't move (0), or some special cases where it returns 1 (can_move = 3 but returns 1 meaning particle will be eaten)
//also photons are still blocked (slowed down) by any particle (even ones it can move through), and absorb wall also blocks particles
int eval = eval_move(t, fin_x, fin_y, NULL);
if (!eval || (can_move[t][TYP(pmap[fin_y][fin_x])] == 3 && eval == 1) || (t == PT_PHOT && pmap[fin_y][fin_x]) || bmap[fin_y/CELL][fin_x/CELL]==WL_DESTROYALL || closedEholeStart!=(bmap[fin_y/CELL][fin_x/CELL] == WL_EHOLE && !emap[fin_y/CELL][fin_x/CELL]))
{
// found an obstacle
clear_xf = fin_xf-dx;
clear_yf = fin_yf-dy;
clear_x = (int)(clear_xf+0.5f);
clear_y = (int)(clear_yf+0.5f);
break;
}
if (bmap[fin_y/CELL][fin_x/CELL]==WL_DETECT && emap[fin_y/CELL][fin_x/CELL]<8)
set_emap(fin_x/CELL, fin_y/CELL);
}
}
auto mr = PlanMove(i, x, y, true);
fin_x = mr.fin_x;
fin_y = mr.fin_y;
clear_x = mr.clear_x;
clear_y = mr.clear_y;
fin_xf = mr.fin_xf;
fin_yf = mr.fin_yf;
clear_xf = mr.clear_xf;
clear_yf = mr.clear_yf;
parts[i].vx = mr.vx;
parts[i].vy = mr.vy;
}
auto stagnant = parts[i].flags & FLAG_STAGNANT;

11
src/simulation/Simulation.h
View File

@ -136,9 +136,16 @@ public:
int do_move(int i, int x, int y, float nxf, float nyf);
bool move(int i, int x, int y, float nxf, float nyf);
int try_move(int i, int x, int y, int nx, int ny);
int eval_move(int pt, int nx, int ny, unsigned *rr);
int eval_move(int pt, int nx, int ny, unsigned *rr) const;
struct PlanMoveResult
{
int fin_x, fin_y, clear_x, clear_y;
float fin_xf, fin_yf, clear_xf, clear_yf;
float vx, vy;
};
PlanMoveResult PlanMove(int i, int x, int y, bool update_emap);
void init_can_move();
bool IsWallBlocking(int x, int y, int type);
bool IsWallBlocking(int x, int y, int type) const;
bool IsElement(int type) const {
return (type > 0 && type < PT_NUM && elements[type].Enabled);
}