h4570
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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# ______ ____ ___
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# | \/ ____| |___|
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# | | | \ | |
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#-----------------------------------------------------------------------
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# Copyright 2020, tyra - https://github.com/h4570/tyra
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# Licenced under Apache License 2.0
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# Sandro Sobczyński <sandro.sobczynski@gmail.com>
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*/
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#include "../include/modules/light.hpp"
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// ----
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// Constructors/Destructors
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// ----
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Light::Light() {}
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Light::~Light() {}
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// ----
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// Methods
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// ----
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const u8 ADDITIONAL_LIGHTS = 1; // Ambient
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const float LIGHT_MAX = 255.0F;
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const float LIGHT_DIS_MOD = 4.0F;
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u16 Light::getLightsCount(u32 t_bulbsCount) { return t_bulbsCount + ADDITIONAL_LIGHTS; }
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/** Calculates lighting. Used in gifSender in object 3D calculations */
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void Light::calculateLight(VECTOR *t_lightDirections, VECTOR *t_lightColors, int *t_lightTypes, LightBulb *t_bulbs, u32 t_lightsCount, Vector3 t_objPosition)
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{
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// --- Ambient light
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t_lightTypes[0] = LIGHT_AMBIENT;
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t_lightDirections[0][0] = 0.0F;
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t_lightDirections[0][1] = 0.0F;
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t_lightDirections[0][2] = 0.0F;
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t_lightDirections[0][3] = 1.0F;
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t_lightColors[0][0] = 0.0F;
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t_lightColors[0][1] = 0.0F;
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t_lightColors[0][2] = 0.0F;
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t_lightColors[0][3] = 1.0F;
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// ---
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for (u8 i = 1; i < t_lightsCount; i++)
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{
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t_lightTypes[i] = LIGHT_DIRECTIONAL;
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Vector3 newLight = Vector3(t_objPosition.x - t_bulbs[i - 1].position.x,
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t_objPosition.y - t_bulbs[i - 1].position.y,
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t_objPosition.z - t_bulbs[i - 1].position.z);
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newLight.normalize();
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t_lightDirections[i][0] = newLight.x;
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t_lightDirections[i][1] = newLight.y;
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t_lightDirections[i][2] = newLight.z;
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t_lightDirections[i][3] = 1.0F;
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// Intensity range 0.0F - 1.0F
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float intensity = t_bulbs[i - 1].intensity / LIGHT_MAX;
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// Distance range 0.0F - LIGHT_MAX * LIGHT_DIS_MOD (1020.0F at this time)
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float distance = t_bulbs[i - 1].position.distanceTo(t_objPosition);
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// printf("Distance:%f\n", distance);
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distance = distance > (LIGHT_MAX - LIGHT_DIS_MOD) * LIGHT_DIS_MOD ? LIGHT_MAX - LIGHT_DIS_MOD : distance;
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intensity /= 1.0F + (distance / LIGHT_DIS_MOD); // intensity /= 1.0F - 251.0F
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intensity /= 3.0F; // it looks better
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t_lightColors[i][0] = intensity;
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t_lightColors[i][1] = intensity;
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t_lightColors[i][2] = intensity;
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t_lightColors[i][3] = 1.0F;
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}
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}
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