X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fshape.hpp;h=4120f76b938ab0ef5a01431aa6ce08633fabd7f7;hb=e53a0e2e711a7d8bd9b0ddacd1360aa14370643f;hp=438fa101d1a9a748cbce4c345762dbf7d1b804d6;hpb=b79bc060068daf80c707f7ca08cb40a716367784;p=blank.git

diff --git a/src/shape.hpp b/src/shape.hpp
index 438fa10..4120f76 100644
--- a/src/shape.hpp
+++ b/src/shape.hpp
@@ -2,6 +2,7 @@
 #define BLANK_SHAPE_HPP_
 
 #include "geometry.hpp"
+#include "model.hpp"
 
 #include <vector>
 #include <glm/glm.hpp>
@@ -11,14 +12,93 @@ namespace blank {
 
 struct Shape {
 
-	virtual size_t VertexCount() const = 0;
-	virtual void Vertices(std::vector<glm::vec3> &, const glm::vec3 &pos = { 0.0f, 0.0f, 0.0f }) const = 0;
-	virtual void Normals(std::vector<glm::vec3> &) const = 0;
+	/// the number of vertices (and normals) this shape has
+	size_t VertexCount() const noexcept { return vtx_pos.size(); }
+	/// the number of vertex indices this shape has
+	size_t VertexIndexCount() const noexcept { return vtx_idx.size(); }
+
+	const Model::Normal &VertexNormal(size_t idx) const noexcept { return vtx_nrm[idx]; }
+	Model::Normal VertexNormal(
+		size_t idx, const glm::mat4 &transform
+	) const noexcept {
+		return Model::Normal(transform * glm::vec4(vtx_nrm[idx], 0.0f));
+	}
+
+	/// fill given buffers with this shape's elements with an
+	/// optional transform and offset
+	void Vertices(
+		Model::Positions &vertex,
+		Model::Normals &normal,
+		Model::Indices &index
+	) const;
+	void Vertices(
+		Model::Positions &vertex,
+		Model::Normals &normal,
+		Model::Indices &index,
+		const glm::mat4 &transform,
+		Model::Index idx_offset = 0
+	) const;
+	void Vertices(
+		BlockModel::Positions &vertex,
+		BlockModel::Indices &index,
+		const glm::mat4 &transform,
+		BlockModel::Index idx_offset = 0
+	) const;
+
+	/// the number of vertices this shape's outline has
+	size_t OutlineCount() const { return out_pos.size(); }
+	/// the number of vertex indices this shape's outline has
+	size_t OutlineIndexCount() const { return out_idx.size(); }
+
+	/// fill given buffers with this shape's outline's elements with
+	/// an optional offset
+	void Outline(
+		OutlineModel::Positions &vertex,
+		OutlineModel::Indices &index,
+		const OutlineModel::Position &offset = { 0.0f, 0.0f, 0.0f },
+		OutlineModel::Index idx_offset = 0
+	) const;
+
+	/// Check if given ray would pass though this shape if it were
+	/// transformed with given matrix.
+	/// If true, dist and normal hold the intersection distance and
+	/// normal, otherwise their content is undefined.
+	virtual bool Intersects(
+		const Ray &,
+		const glm::mat4 &,
+		float &dist,
+		glm::vec3 &normal
+	) const noexcept = 0;
+
+protected:
+	void SetShape(const Model::Positions &pos, const Model::Normals &nrm, const Model::Indices &idx) {
+		vtx_pos = pos;
+		vtx_nrm = nrm;
+		vtx_idx = idx;
+	}
+	void SetOutline(const OutlineModel::Positions &pos, const OutlineModel::Indices &idx) {
+		out_pos = pos;
+		out_idx = idx;
+	}
+
+private:
+	Model::Positions vtx_pos;
+	Model::Normals vtx_nrm;
+	Model::Indices vtx_idx;
+
+	OutlineModel::Positions out_pos;
+	OutlineModel::Indices out_idx;
+
+};
 
-	virtual size_t OutlineCount() const = 0;
-	virtual void Outline(std::vector<glm::vec3> &, const glm::vec3 &pos = { 0.0f, 0.0f, 0.0f }) const = 0;
 
-	virtual bool Intersects(const Ray &, const glm::mat4 &, float &dist, glm::vec3 &normal) const = 0;
+class NullShape
+: public Shape {
+
+public:
+	NullShape();
+
+	bool Intersects(const Ray &, const glm::mat4 &, float &, glm::vec3 &) const noexcept override;
 
 };
 
@@ -29,17 +109,24 @@ class CuboidShape
 public:
 	CuboidShape(const AABB &bounds);
 
-	size_t VertexCount() const override;
-	void Vertices(std::vector<glm::vec3> &, const glm::vec3 &) const override;
-	void Normals(std::vector<glm::vec3> &) const override;
+	bool Intersects(const Ray &, const glm::mat4 &, float &, glm::vec3 &) const noexcept override;
 
-	size_t OutlineCount() const override;
-	void Outline(std::vector<glm::vec3> &, const glm::vec3 &) const override;
+private:
+	AABB bb;
+
+};
 
-	bool Intersects(const Ray &, const glm::mat4 &, float &, glm::vec3 &) const override;
+
+class StairShape
+: public Shape {
+
+public:
+	StairShape(const AABB &bounds, const glm::vec2 &clip);
+
+	bool Intersects(const Ray &, const glm::mat4 &, float &, glm::vec3 &) const noexcept override;
 
 private:
-	AABB bb;
+	AABB top, bot;
 
 };