34 lines
819 B
C++
34 lines
819 B
C++
#include "plane.hpp"
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#include "../ray.hpp"
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bool Plane::Intersect(Ray& ray, float& t) {
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t = INFINITY;
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float dNormal = glm::dot(normal, ray.direction);
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if (dNormal > 1e-6) {
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glm::vec3 v = center - ray.origin;
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float distance = glm::dot(v, normal) / dNormal;
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if (distance >= 0.0f) {
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t = distance;
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return true;
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}
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}
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return false;
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}
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glm::vec3 Plane::SurfaceNormal(glm::vec3 hitPoint) {
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return -normal;
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}
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glm::vec2 Plane::TexCoords(glm::vec3 hitPoint) {
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glm::vec3 xAxis = glm::cross(normal, { 0.0f, 0.0f, 1.0f });
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if (xAxis.length() == 0.0f) xAxis = glm::cross(normal, { 0.0f, 1.0f, 0.0f });
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glm::vec3 yAxis = glm::cross(normal, xAxis);
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glm::vec3 hit = hitPoint - center;
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return { glm::dot(hit, xAxis), glm::dot(hit, yAxis) };
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}
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void Plane::Translate(glm::vec3 trans) {
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center += trans;
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}
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