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https://github.com/Aurorastation/Aurora.3.git
synced 2025-12-22 08:01:06 +00:00
21e06212b6
changes: Z-lights can now shine both upwards and downwards. Z-lights will now get less intense with each zlevel traversed. Sunlight no longer has distance falloff. Minor optimizations/simplification for directional lighting.
59 lines
2.4 KiB
Plaintext
59 lines
2.4 KiB
Plaintext
// This is the define used to calculate falloff.
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#define LUM_FALLOFF(Cx,Cy,Tx,Ty,HEIGHT) (1 - CLAMP01(sqrt(((Cx) - (Tx)) ** 2 + ((Cy) - (Ty)) ** 2 + HEIGHT) / max(1, actual_range)))
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// Macro that applies light to a new corner.
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// It is a macro in the interest of speed, yet not having to copy paste it.
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// If you're wondering what's with the backslashes, the backslashes cause BYOND to not automatically end the line.
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// As such this all gets counted as a single line.
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// The braces and semicolons are there to be able to do this on a single line.
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#define APPLY_CORNER_SIMPLE(C) \
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. = light_power; \
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var/OLD = effect_str[C]; \
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effect_str[C] = .; \
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C.update_lumcount \
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( \
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(. * lum_r) - (OLD * applied_lum_r), \
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(. * lum_g) - (OLD * applied_lum_g), \
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(. * lum_b) - (OLD * applied_lum_b), \
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(. * lum_u) - (OLD * applied_lum_u), \
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FALSE \
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);
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#define APPLY_CORNER(C,now,Tx,Ty,hdiff) \
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. = LUM_FALLOFF(C.x, C.y, Tx, Ty, hdiff) * light_power; \
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var/OLD = effect_str[C]; \
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effect_str[C] = .; \
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C.update_lumcount \
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( \
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(. * lum_r) - (OLD * applied_lum_r), \
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(. * lum_g) - (OLD * applied_lum_g), \
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(. * lum_b) - (OLD * applied_lum_b), \
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(. * lum_u) - (OLD * applied_lum_u), \
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now \
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);
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// I don't need to explain what this does, do I?
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#define REMOVE_CORNER(C,now) \
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. = -effect_str[C]; \
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C.update_lumcount \
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( \
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. * applied_lum_r, \
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. * applied_lum_g, \
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. * applied_lum_b, \
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. * applied_lum_u, \
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now \
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);
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// Converts two Z levels into a height value for LUM_FALLOFF or HEIGHT_FALLOFF.
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#define CALCULATE_CORNER_HEIGHT(ZA,ZB) (((max(ZA,ZB) - min(ZA,ZB)) + 1) * LIGHTING_HEIGHT * LIGHTING_Z_FACTOR)
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#define APPLY_CORNER_BY_HEIGHT(now) \
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if (C.z != Sz) { \
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corner_height = CALCULATE_CORNER_HEIGHT(C.z, Sz); \
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} \
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else { \
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corner_height = LIGHTING_HEIGHT; \
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} \
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APPLY_CORNER(C, now, Sx, Sy, corner_height);
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