mirror of https://github.com/minetest/minetest.git
55 lines
903 B
C
55 lines
903 B
C
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#ifndef LIGHT_HEADER
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#define LIGHT_HEADER
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#include "common_irrlicht.h"
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// This directly sets the range of light
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#define LIGHT_MAX 14
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// This brightness is reserved for sunlight
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#define LIGHT_SUN 15
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inline u8 diminish_light(u8 light)
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{
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if(light == 0)
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return 0;
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if(light >= LIGHT_MAX)
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return LIGHT_MAX - 1;
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return light - 1;
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}
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inline u8 diminish_light(u8 light, u8 distance)
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{
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if(distance >= light)
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return 0;
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return light - distance;
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}
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inline u8 undiminish_light(u8 light)
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{
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// We don't know if light should undiminish from this particular 0.
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// Thus, keep it at 0.
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if(light == 0)
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return 0;
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if(light == LIGHT_MAX)
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return light;
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return light + 1;
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}
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extern u8 light_decode_table[LIGHT_MAX+1];
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inline u8 decode_light(u8 light)
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{
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if(light == LIGHT_SUN)
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return light_decode_table[LIGHT_MAX];
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if(light > LIGHT_MAX)
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throw;
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return light_decode_table[light];
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}
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#endif
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