76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
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#include "shared/types.h"
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#include "shared/functions.h"
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#include <stdlib.h>
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typedef enum
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{
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MODE_NULL,
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MODE_ADD_VALUE,
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MODE_FIX_VALUE
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} _EnumMode;
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struct HeightModifier
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{
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Zone* zone;
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_EnumMode mode;
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double value;
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};
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HeightModifier* modifierCreate()
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{
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HeightModifier* modifier;
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modifier = (HeightModifier*)malloc(sizeof(HeightModifier));
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modifier->zone = zoneCreate();
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modifier->mode = MODE_NULL;
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return modifier;
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}
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void modifierDelete(HeightModifier* modifier)
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{
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zoneDelete(modifier->zone);
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free(modifier);
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}
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Zone* modifierGetZone(HeightModifier* modifier)
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{
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return modifier->zone;
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}
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void modifierActionAddValue(HeightModifier* modifier, double value)
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{
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modifier->mode = MODE_ADD_VALUE;
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modifier->value = value;
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}
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void modifierActionFixValue(HeightModifier* modifier, double value)
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{
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modifier->mode = MODE_FIX_VALUE;
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modifier->value = value;
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}
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Vector3 modifierApply(HeightModifier* modifier, Vector3 location)
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{
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double influence, diff;
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Vector3 normal;
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switch (modifier->mode)
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{
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case MODE_ADD_VALUE:
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influence = zoneGetValue(modifier->zone, location, normal);
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location.y += modifier->value * influence;
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break;
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case MODE_FIX_VALUE:
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influence = zoneGetValue(modifier->zone, location, normal);
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diff = modifier->value - location.y;
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location.y += diff * influence;
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break;
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case MODE_NULL:
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break;
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}
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return location;
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}
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