X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fgeometry.cpp;fp=src%2Fgeometry.cpp;h=0000000000000000000000000000000000000000;hb=b7d09e1e35ef90282c97509e0020b20db3c7ea9f;hp=416d930c4f68d0c24a0f690851264b98556b855b;hpb=e53a0e2e711a7d8bd9b0ddacd1360aa14370643f;p=blank.git

diff --git a/src/geometry.cpp b/src/geometry.cpp
deleted file mode 100644
index 416d930..0000000
--- a/src/geometry.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-#include "geometry.hpp"
-
-#include <limits>
-
-
-namespace blank {
-
-bool Intersection(
-	const Ray &ray,
-	const AABB &aabb,
-	const glm::mat4 &M,
-	float *dist,
-	glm::vec3 *normal
-) noexcept {
-	float t_min = 0.0f;
-	float t_max = std::numeric_limits<float>::infinity();
-	const glm::vec3 aabb_pos(M[3].x, M[3].y, M[3].z);
-	const glm::vec3 delta = aabb_pos - ray.orig;
-
-	glm::vec3 t1(t_min, t_min, t_min), t2(t_max, t_max, t_max);
-
-	for (int i = 0; i < 3; ++i) {
-		const glm::vec3 axis(M[i].x, M[i].y, M[i].z);
-		const float e = glm::dot(axis, delta);
-		const float f = glm::dot(axis, ray.dir);
-
-		if (std::abs(f) > std::numeric_limits<float>::epsilon()) {
-			t1[i] = (e + aabb.min[i]) / f;
-			t2[i] = (e + aabb.max[i]) / f;
-
-			t_min = std::max(t_min, std::min(t1[i], t2[i]));
-			t_max = std::min(t_max, std::max(t1[i], t2[i]));
-
-			if (t_max < t_min) {
-				return false;
-			}
-		} else {
-			if (aabb.min[i] - e < 0.0f || -aabb.max[i] - e > 0.0f) {
-				return false;
-			}
-		}
-	}
-
-	glm::vec3 min_all(min(t1, t2));
-
-	if (dist) {
-		*dist = t_min;
-	}
-	if (normal) {
-		glm::vec4 norm(0.0f);
-		if (min_all.x > min_all.y) {
-			if (min_all.x > min_all.z) {
-				norm.x = t2.x < t1.x ? 1 : -1;
-			} else {
-				norm.z = t2.z < t1.z ? 1 : -1;
-			}
-		} else if (min_all.y > min_all.z) {
-			norm.y = t2.y < t1.y ? 1 : -1;
-		} else {
-			norm.z = t2.z < t1.z ? 1 : -1;
-		}
-		norm = M * norm;
-		*normal = glm::vec3(norm);
-	}
-	return true;
-}
-
-bool CullTest(const AABB &box, const glm::mat4 &MVP) noexcept {
-	// transform corners into clip space
-	glm::vec4 corners[8] = {
-		{ box.min.x, box.min.y, box.min.z, 1.0f },
-		{ box.min.x, box.min.y, box.max.z, 1.0f },
-		{ box.min.x, box.max.y, box.min.z, 1.0f },
-		{ box.min.x, box.max.y, box.max.z, 1.0f },
-		{ box.max.x, box.min.y, box.min.z, 1.0f },
-		{ box.max.x, box.min.y, box.max.z, 1.0f },
-		{ box.max.x, box.max.y, box.min.z, 1.0f },
-		{ box.max.x, box.max.y, box.max.z, 1.0f },
-	};
-	for (glm::vec4 &corner : corners) {
-		corner = MVP * corner;
-		corner /= corner.w;
-	}
-
-	int hits[6] = { 0, 0, 0, 0, 0, 0 };
-
-	// check how many corners lie outside
-	for (const glm::vec4 &corner : corners) {
-		if (corner.x >  1.0f) ++hits[0];
-		if (corner.x < -1.0f) ++hits[1];
-		if (corner.y >  1.0f) ++hits[2];
-		if (corner.y < -1.0f) ++hits[3];
-		if (corner.z >  1.0f) ++hits[4];
-		if (corner.z < -1.0f) ++hits[5];
-	}
-
-	// if all corners are outside any given clip plane, the test is true
-	for (int hit : hits) {
-		if (hit == 8) return true;
-	}
-
-	// otherwise the box might still get culled completely, but can't say for sure ;)
-	return false;
-}
-
-}