SIM_MAX_RADIATION doesn't work properly

Environment:

• Branch 663500

Problem:

• Radiation clamp doesn't work on cells blow the red line

Pseudocode:

void SimBase::UpdateData(SimData* simData)
{
// ...
	// Update Radiation
	if (simData->radiationEnabled) {
// ...
		for (int yIdx = region.minimum.y; yIdx < region.maximum.y; yIdx++) {
			for (int xIdx = region.minimum.x; yIdx < region.maximum.x; xIdx++) {
				int cell = simData->width * yIdx + xIdx;
				// Radiation diffusion to surrounding cells
				float massFactor = gElementRadiationData[simData->updatedCells->elementIdx[cell]].rads_per_1000;
				if (massFactor > 0.0) {
					for (Vector3<float> offset : adjacentOffsets) {
						int xIdx2 = xIdx + (int)offset.x;
						int yIdx2 = yIdx + (int)offset.y;
						if (xIdx2< region.minimum.x || xIdx2 > region.maximum.x) continue;
						if (yIdx2< region.minimum.y || yIdx2 > region.maximum.y) continue;

						int cella = simData->width * yIdx2 + xIdx2;
						simData->updatedCells->radiation[cella] += simData->updatedCells->mass[cell] * 0.001f * massFactor * offset.z;
					}
				}
// ...
				// Clamp
				simData->updatedCells->radiation[cell] = fminf(simData->updatedCells->radiation[cell], SIM_MAX_RADIATION);
				if (simData->updatedCells->radiation[cell] < 0.01)
					simData->updatedCells->radiation[cell] = 0;
			}
		}
	}
// ...
}

Reason:

• Clamp only applies to current cell.
• Current cell emits radiation to surrounding cells.
• Cells in Bottom/Left are clamped first then receive radiation and will not be clamped again.

Solution:

• Cut the loop into two parts. Do clamp after finishing all calculation

// ...
			}
		}
		for (int yIdx = region.minimum.y; yIdx < region.maximum.y; yIdx++) {
			for (int xIdx = region.minimum.x; yIdx < region.maximum.x; xIdx++) {
				int cell = simData->width * yIdx + xIdx;
				// Clamp
				simData->updatedCells->radiation[cell] = fminf(simData->updatedCells->radiation[cell], SIM_MAX_RADIATION);