60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Light implementation
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*
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* Created by Manoël Trapier
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* Copyright (c) 2020 986-Studio.
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*
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*/
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#include <stdio.h>
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#include <light.h>
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#include <world.h>
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void Light::dumpMe(FILE *fp)
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{
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fprintf(fp, "\"Colour\": {\"red\": %f, \"green\": %f, \"blue\": %f},\n",
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this->intensity.x, this->intensity.y, this->intensity.z);
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fprintf(fp, "\"Position\": {\"x\": %f, \"y\": %f, \"z\":%f},\n",
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this->position.x, this->position.y, this->position.z);
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fprintf(fp, "\"Type\": \"PointLight\",\n");
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}
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double Light::intensityAt(World &w, Tuple point)
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{
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switch(this->type)
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{
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case POINT_LIGHT:
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default:
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return (w.isShadowed(point, this->position))?0.0:1.0;
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case AREA_LIGHT:
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double total = 0.0;
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uint32_t v, u;
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for(v = 0; v < this->vSteps; v++)
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{
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for(u = 0; u < this->uSteps; u++)
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{
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if (!w.isShadowed(point, this->pointOnLight(u, v)))
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{
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total = total + 1.0;
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}
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}
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}
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return total / this->samples;
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break;
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}
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}
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Tuple Light::pointOnLight(uint32_t u, uint32_t v)
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{
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if (this->jitter)
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{
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/* For some reason, for the test to pass, I need to get the sequence for V first, then U contrary to what
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* the bonus chapter says
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*/
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return this->corner +
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this->vVec * (v + this->jitterBy.next()) +
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this->uVec * (u + this->jitterBy.next());
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}
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return this->corner + this->uVec * (u + 0.5) + this->vVec * (v + 0.5);
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} |