81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
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#include "BaseCloudLayerRenderer.h"
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#include "CloudLayerDefinition.h"
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BaseCloudLayerRenderer::BaseCloudLayerRenderer(SoftwareRenderer* parent):
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parent(parent)
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{
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}
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BaseCloudLayerRenderer::~BaseCloudLayerRenderer()
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{
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}
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double BaseCloudLayerRenderer::getDensity(CloudLayerDefinition *, const Vector3 &)
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{
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return 0.0;
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}
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Color BaseCloudLayerRenderer::getColor(CloudLayerDefinition *, const Vector3 &, const Vector3 &)
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{
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return COLOR_TRANSPARENT;
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}
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bool BaseCloudLayerRenderer::alterLight(CloudLayerDefinition *, LightDefinition *, const Vector3 &, const Vector3 &)
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{
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return false;
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}
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bool BaseCloudLayerRenderer::optimizeSearchLimits(CloudLayerDefinition *layer, Vector3 *start, Vector3 *end)
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{
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Vector3 diff;
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if (start->y > layer->lower_altitude + layer->thickness)
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{
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if (end->y >= layer->lower_altitude + layer->thickness)
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{
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return false;
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}
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else
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{
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diff = v3Sub(*end, *start);
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*start = v3Add(*start, v3Scale(diff, (layer->lower_altitude + layer->thickness - start->y) / diff.y));
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if (end->y < layer->lower_altitude)
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{
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*end = v3Add(*end, v3Scale(diff, (layer->lower_altitude - end->y) / diff.y));
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}
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}
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}
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else if (start->y < layer->lower_altitude)
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{
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if (end->y <= layer->lower_altitude)
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{
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return false;
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}
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else
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{
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diff = v3Sub(*end, *start);
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*start = v3Add(*start, v3Scale(diff, (layer->lower_altitude - start->y) / diff.y));
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if (end->y >= layer->lower_altitude + layer->thickness)
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{
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*end = v3Add(*end, v3Scale(diff, (layer->lower_altitude + layer->thickness - end->y) / diff.y));
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}
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}
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}
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else /* start is inside layer */
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{
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diff = v3Sub(*end, *start);
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if (end->y > layer->lower_altitude + layer->thickness)
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{
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*end = v3Add(*start, v3Scale(diff, (layer->lower_altitude + layer->thickness - start->y) / diff.y));
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}
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else if (end->y < layer->lower_altitude)
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{
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*end = v3Add(*start, v3Scale(diff, (layer->lower_altitude - start->y) / diff.y));
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}
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}
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return true;
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}
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