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Lauchmelder 2021-12-10 02:59:15 +01:00
parent 4eebb5821d
commit bd061968dc
1 changed files with 12 additions and 3 deletions
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15
src/FluidField.cpp
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@ -48,6 +48,7 @@ FluidField::~FluidField()
void FluidField::AddSource(int x, int y, double dens, double dt) void FluidField::AddSource(int x, int y, double dens, double dt)
{ {
PVALUE(density, x, y) += dt * dens; PVALUE(density, x, y) += dt * dens;
PVALUE(density, x, y) = std::max(PVALUE(density, x, y), 0.0);
} }
void FluidField::ApplyBoundaryConditions(BoundaryCondition condition, std::vector<double>& field) void FluidField::ApplyBoundaryConditions(BoundaryCondition condition, std::vector<double>& field)
@ -128,11 +129,19 @@ void FluidField::DensityStep(double diff, double dt)
// AddSource(3, 50, 60.0, dt); // AddSource(3, 50, 60.0, dt);
int x, y; int x, y;
SDL_GetMouseState(&x, &y); Uint32 buttons = SDL_GetMouseState(&x, &y);
int dx = (double)(this->size - 2) / (double)(990 - 10) * (double)(x - 10); int dx = (double)(this->size - 2) / (double)(990 - 10) * (double)(x - 10);
int dy = (double)(this->size - 2) / (double)(990 - 10) * (double)(y - 10); int dy = (double)(this->size - 2) / (double)(990 - 10) * (double)(y - 10);
if(dx > 1 && dx < this->size - 2 && dy > 1 && dy < this->size - 2)
AddSource(dx, dy, 60.0, dt); int factor = 0;
if (buttons & SDL_BUTTON_LMASK)
factor = 1;
else if (buttons & SDL_BUTTON_RMASK)
factor = -1;
if(dx > 0 && dx < this->size - 1 && dy > 0 && dy < this->size - 1)
AddSource(dx, dy, 60.0 * factor, dt);
std::swap(prevDensity, density); std::swap(prevDensity, density);
Diffuse(diff, dt); Diffuse(diff, dt);