X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fworld%2FChunk.hpp;h=045f58df7d6ac29f1140fea27849cc212aea5e30;hb=ab0ba4313c473378b4516e3702d524dc1d1fc5d4;hp=d0dcf9404219ba063f91fb9b2e5dced933df40e9;hpb=7354c74fb8f409336db3a6d70455fbc10232ae64;p=blank.git

diff --git a/src/world/Chunk.hpp b/src/world/Chunk.hpp
index d0dcf94..045f58d 100644
--- a/src/world/Chunk.hpp
+++ b/src/world/Chunk.hpp
@@ -6,6 +6,7 @@
 #include "../geometry/Location.hpp"
 #include "../geometry/primitive.hpp"
 
+#include <set>
 #include <vector>
 #include <glm/glm.hpp>
 #include <glm/gtx/transform.hpp>
@@ -34,6 +35,14 @@ public:
 	static glm::vec3 Center() noexcept { return glm::vec3(8.0f); }
 	static float Radius() noexcept { return 27.71281292110203669632f; /* 16 * √3 */ }
 
+	/// get bounding box relative to given reference chunk
+	AABB RelativeBounds(const ExactLocation::Coarse &ref) const noexcept {
+		AABB bounds;
+		bounds.min = (position - ref) * ExactLocation::Extent();
+		bounds.max = bounds.min + ExactLocation::FExtent();
+		return bounds;
+	}
+
 	static constexpr bool InBounds(const ExactLocation::Fine &pos) noexcept {
 		return
 			pos.x >= 0.0f && pos.x < fside &&
@@ -132,12 +141,15 @@ public:
 
 	float GetVertexLight(const RoughLocation::Fine &, const BlockMesh::Position &, const EntityMesh::Normal &) const noexcept;
 
+	/// get gravity for one unit mass at given point
+	glm::vec3 GravityAt(const ExactLocation &) const noexcept;
+
 	bool Intersection(
 		const Ray &ray,
 		const ExactLocation::Coarse &reference,
 		float &dist
 	) const noexcept {
-		return blank::Intersection(ray, Bounds(), Transform(reference), &dist);
+		return blank::Intersection(ray, RelativeBounds(reference), dist);
 	}
 
 	/// check if given ray intersects any block of this chunk
@@ -175,6 +187,10 @@ public:
 	bool Lighted() const noexcept { return lighted; }
 	void ScanLights();
 
+	/// check for active blocks, should be called after
+	/// block data was modified by means other than SetBlock()
+	void ScanActive();
+
 	void Ref() noexcept { ++ref_count; }
 	void UnRef() noexcept { --ref_count; }
 	bool Referenced() const noexcept { return ref_count > 0; }
@@ -192,6 +208,8 @@ private:
 	const BlockTypeRegistry *types;
 	Chunk *neighbor[Block::FACE_COUNT];
 
+	std::set<int> gravity;
+
 	Block blocks[size];
 	unsigned char light[size];
 	bool generated;