90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Material 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 <tuple.h>
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#include <material.h>
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#include <colour.h>
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#include <shape.h>
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Colour Material::lighting(Light light, Tuple point, Tuple eyeVector, Tuple normalVector, Shape *hitObject,
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double lightIntensity)
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{
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Colour pointColor = this->colour;
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if (this->pattern != nullptr)
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{
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pointColor = this->pattern->patternAtObject(hitObject, point);
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}
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Tuple lightVector = (light.position - point).normalise();
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Tuple reflectVector = Tuple(0, 0, 0, 0);
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Tuple effectiveColour = pointColor * light.intensity;
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Tuple ambientColour = Colour(0, 0, 0);
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Tuple emissiveColour = Colour(0, 0, 0);
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Tuple diffuseColour = Colour(0, 0, 0);
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Tuple specularColour = Colour(0, 0, 0);
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Tuple finalColour = Colour(0, 0, 0);
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double lightDotNormal, reflectDotEye;
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ambientColour = effectiveColour * this->ambient;
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emissiveColour = pointColor * this->emissive;
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lightDotNormal = lightVector.dot(normalVector);
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if (lightDotNormal < 0)
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{
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diffuseColour = Colour(0, 0, 0);
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specularColour = Colour(0, 0, 0);
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}
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else
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{
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diffuseColour = effectiveColour * this->diffuse * lightDotNormal;
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reflectVector = -lightVector.reflect(normalVector);
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reflectDotEye = reflectVector.dot(eyeVector);
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if (reflectDotEye < 0)
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{
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specularColour = Colour(0, 0, 0);
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}
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else
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{
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double factor = pow(reflectDotEye, this->shininess);
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specularColour = light.intensity * this->specular * factor;
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}
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}
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diffuseColour = diffuseColour * lightIntensity;
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specularColour = specularColour * lightIntensity;
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finalColour = emissiveColour + ambientColour + diffuseColour + specularColour;
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return Colour(finalColour.x, finalColour.y, finalColour.z);
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}
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void Material::dumpMe(FILE *fp)
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{
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fprintf(fp, "\"Colour\": {\"red\": %f, \"green\": %f, \"blue\": %f},\n", this->colour.x, this->colour.y, this->colour.z);
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fprintf(fp, "\"Ambient\": %f,\n", this->ambient);
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fprintf(fp, "\"Diffuse\": %f,\n", this->diffuse);
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fprintf(fp, "\"Specular\": %f,\n", this->specular);
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fprintf(fp, "\"Shininess\": %f,\n", this->shininess);
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fprintf(fp, "\"Reflective\": %f,\n", this->reflective);
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fprintf(fp, "\"Transparency\": %f,\n", this->transparency);
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fprintf(fp, "\"Emissive\": %f,\n", this->emissive);
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fprintf(fp, "\"RefractiveIndex\": %f,\n", this->refractiveIndex);
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if (this->pattern)
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{
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fprintf(fp, "\"Pattern\": {\n");
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this->pattern->dumpMe(fp);
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fprintf(fp, "},\n");
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}
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} |