51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
#include "simulation.h"
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namespace simulation
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{
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unsigned int getCellOffset(
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unsigned char x,
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unsigned char y,
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unsigned char z,
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SimulationGrid* grid)
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{
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if (x < grid->x_max && y < grid->y_max && z < grid->z_max)
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{
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unsigned int offset = x + y * grid->x_max + z * (grid->y_max * grid->x_max);
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return offset;
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}
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return -1;
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}
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void step(
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double millisecondsSinceLastStep,
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SimulationGrid* input,
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SimulationGrid* output)
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{
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for (unsigned char x = 0; x < input->x_max; x++)
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{
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for (unsigned char y = 0; y < input->y_max; y++)
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{
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for (unsigned char z = 0; z < input->z_max; z++)
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{
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unsigned int offset = getCellOffset(x, y, z, input);
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unsigned int material = input->cells[offset];
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switch (material)
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{
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case WATER:
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if (y > 0)
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{
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unsigned int downOffset = getCellOffset(x, y - 1, z, input);
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// Flow down if cell is empty
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if (output->cells[downOffset] == 0)
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{
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output->cells[downOffset] = material;
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}
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}
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default:
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output->cells[offset] = material;
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}
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}
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}
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}
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}
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}
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