Rename TerrainMesh to GeoData to drop inplace

1 files changed, 0 insertions, 221 deletions

diff --git a/game/terrain2.cpp b/game/terrain2.cpp
deleted file mode 100644
index 0e8b78e..0000000
--- a/game/terrain2.cpp
+++ /dev/null
@@ -1,221 +0,0 @@
-#include "terrain2.h"
-#include <fstream>
-#include <glm/gtx/intersect.hpp>
-#include <maths.h>
-
-TerrainMesh
-TerrainMesh::loadFromAsciiGrid(const std::filesystem::path & input)
-{
-	size_t ncols = 0, nrows = 0, xllcorner = 0, yllcorner = 0, cellsize = 0;
-	std::map<std::string_view, size_t *> properties {
-			{"ncols", &ncols},
-			{"nrows", &nrows},
-			{"xllcorner", &xllcorner},
-			{"yllcorner", &yllcorner},
-			{"cellsize", &cellsize},
-	};
-	std::ifstream f {input};
-	while (!properties.empty()) {
-		std::string property;
-		f >> property;
-		f >> *properties.at(property);
-		properties.erase(property);
-	}
-	std::vector<VertexHandle> vertices;
-	vertices.reserve(ncols * nrows);
-	TerrainMesh mesh;
-	mesh.lowerExtent = {xllcorner, yllcorner, std::numeric_limits<float>::max()};
-	mesh.upperExtent
-			= {xllcorner + (cellsize * ncols), yllcorner + (cellsize * nrows), std::numeric_limits<float>::min()};
-	for (size_t row = 0; row < nrows; ++row) {
-		for (size_t col = 0; col < ncols; ++col) {
-			float height = 0;
-			f >> height;
-			mesh.upperExtent.z = std::max(mesh.upperExtent.z, height);
-			mesh.lowerExtent.z = std::min(mesh.lowerExtent.z, height);
-			vertices.push_back(mesh.add_vertex({xllcorner + (col * cellsize), yllcorner + (row * cellsize), height}));
-		}
-	}
-	if (!f.good()) {
-		throw std::runtime_error("Couldn't read terrain file");
-	}
-	for (size_t row = 1; row < nrows; ++row) {
-		for (size_t col = 1; col < ncols; ++col) {
-			mesh.add_face({
-					vertices[ncols * (row - 1) + (col - 1)],
-					vertices[ncols * (row - 0) + (col - 0)],
-					vertices[ncols * (row - 0) + (col - 1)],
-			});
-			mesh.add_face({
-					vertices[ncols * (row - 1) + (col - 1)],
-					vertices[ncols * (row - 1) + (col - 0)],
-					vertices[ncols * (row - 0) + (col - 0)],
-			});
-		}
-	}
-	mesh.update_face_normals();
-	mesh.update_vertex_normals();
-
-	return mesh;
-};
-
-OpenMesh::FaceHandle
-TerrainMesh::findPoint(glm::vec2 p) const
-{
-	return findPoint(p, *faces_begin());
-}
-
-TerrainMesh::PointFace::PointFace(const glm::vec2 p, const TerrainMesh * mesh) :
-	PointFace {p, mesh, *mesh->faces_begin()}
-{
-}
-
-TerrainMesh::PointFace::PointFace(const glm::vec2 p, const TerrainMesh * mesh, FaceHandle start) :
-	PointFace {p, mesh->findPoint(p, start)}
-{
-}
-
-TerrainMesh::FaceHandle
-TerrainMesh::PointFace::face(const TerrainMesh * mesh, FaceHandle start) const
-{
-	if (_face.is_valid()) {
-		assert(mesh->triangleContainsPoint(point, _face));
-		return _face;
-	}
-	else {
-		return (_face = mesh->findPoint(point, start));
-	}
-}
-
-TerrainMesh::FaceHandle
-TerrainMesh::PointFace::face(const TerrainMesh * mesh) const
-{
-	return face(mesh, *mesh->faces_begin());
-}
-
-namespace {
-	[[nodiscard]] constexpr inline bool
-	pointLeftOfLine(const glm::vec2 p, const glm::vec2 e1, const glm::vec2 e2)
-	{
-		return (e2.x - e1.x) * (p.y - e1.y) > (e2.y - e1.y) * (p.x - e1.x);
-	}
-
-	static_assert(pointLeftOfLine({1, 2}, {1, 1}, {2, 2}));
-	static_assert(pointLeftOfLine({2, 1}, {2, 2}, {1, 1}));
-	static_assert(pointLeftOfLine({2, 2}, {1, 2}, {2, 1}));
-	static_assert(pointLeftOfLine({1, 1}, {2, 1}, {1, 2}));
-
-	[[nodiscard]] constexpr inline bool
-	linesCross(const glm::vec2 a1, const glm::vec2 a2, const glm::vec2 b1, const glm::vec2 b2)
-	{
-		return pointLeftOfLine(a2, b1, b2) && pointLeftOfLine(a1, b2, b1) && pointLeftOfLine(b1, a1, a2)
-				&& pointLeftOfLine(b2, a2, a1);
-	}
-
-	static_assert(linesCross({1, 1}, {2, 2}, {1, 2}, {2, 1}));
-}
-
-OpenMesh::FaceHandle
-TerrainMesh::findPoint(glm::vec2 p, OpenMesh::FaceHandle f) const
-{
-	ConstFaceVertexIter vertices;
-	while (f.is_valid() && !triangleContainsPoint(p, vertices = cfv_iter(f))) {
-		for (auto next = cfh_iter(f); next.is_valid(); ++next) {
-			f = opposite_face_handle(*next);
-			if (f.is_valid()) {
-				const auto e1 = point(to_vertex_handle(*next));
-				const auto e2 = point(to_vertex_handle(opposite_halfedge_handle(*next)));
-				if (pointLeftOfLine(p, e1, e2)) {
-					break;
-				}
-			}
-			f.reset();
-		}
-	}
-	return f;
-}
-
-glm::vec3
-TerrainMesh::positionAt(const PointFace & p) const
-{
-	glm::vec3 out {};
-	Triangle<3> t {this, fv_range(p.face(this))};
-	glm::intersectLineTriangle(p.point ^ 0.F, up, t[0], t[1], t[2], out);
-	return p.point ^ out[0];
-}
-
-[[nodiscard]] std::optional<glm::vec3>
-TerrainMesh::intersectRay(const Ray & ray) const
-{
-	return intersectRay(ray, findPoint(ray.start));
-}
-
-[[nodiscard]] std::optional<glm::vec3>
-TerrainMesh::intersectRay(const Ray & ray, FaceHandle face) const
-{
-	std::optional<glm::vec3> out;
-	walkUntil(PointFace {ray.start, face}, ray.start + (ray.direction * 10000.F), [&out, &ray, this](FaceHandle face) {
-		glm::vec2 bari {};
-		float dist {};
-		Triangle<3> t {this, fv_range(face)};
-		if (glm::intersectRayTriangle(ray.start, ray.direction, t[0], t[1], t[2], bari, dist)) {
-			out = t * bari;
-			return true;
-		}
-		return false;
-	});
-	return out;
-}
-
-void
-TerrainMesh::walk(const PointFace & from, const glm::vec2 to, const std::function<void(FaceHandle)> & op) const
-{
-	walkUntil(from, to, [&op](const auto & fh) {
-		op(fh);
-		return false;
-	});
-}
-
-void
-TerrainMesh::walkUntil(const PointFace & from, const glm::vec2 to, const std::function<bool(FaceHandle)> & op) const
-{
-	assert(from.face(this).is_valid()); // TODO replace with a boundary search
-	auto f = from.face(this);
-	FaceHandle previousFace;
-	while (f.is_valid() && !op(f)) {
-		for (auto next = cfh_iter(f); next.is_valid(); ++next) {
-			f = opposite_face_handle(*next);
-			if (f.is_valid() && f != previousFace) {
-				const auto e1 = point(to_vertex_handle(*next));
-				const auto e2 = point(to_vertex_handle(opposite_halfedge_handle(*next)));
-				if (linesCross(from.point, to, e1, e2)) {
-					previousFace = f;
-					break;
-				}
-			}
-			f.reset();
-		}
-	}
-}
-
-bool
-TerrainMesh::triangleContainsPoint(const glm::vec2 p, const glm::vec2 a, const glm::vec2 b, const glm::vec2 c)
-{
-	const auto det = (b.x - a.x) * (c.y - a.y) - (b.y - a.y) * (c.x - a.x);
-
-	return det * ((b.x - a.x) * (p.y - a.y) - (b.y - a.y) * (p.x - a.x)) >= 0
-			&& det * ((c.x - b.x) * (p.y - b.y) - (c.y - b.y) * (p.x - b.x)) >= 0
-			&& det * ((a.x - c.x) * (p.y - c.y) - (a.y - c.y) * (p.x - c.x)) >= 0;
-}
-
-bool
-TerrainMesh::triangleContainsPoint(const glm::vec2 p, FaceHandle face) const
-{
-	return triangleContainsPoint(p, cfv_iter(face));
-}
-
-bool
-TerrainMesh::triangleContainsPoint(const glm::vec2 p, ConstFaceVertexIter vertices) const
-{
-	return triangleContainsPoint(p, point(*vertices++), point(*vertices++), point(*vertices++));
-}