renamed Shape -> CollisionBounds

[blank.git] / src / model / CollisionBounds.hpp

diff --git a/src/model/CollisionBounds.hpp b/src/model/CollisionBounds.hpp
new file mode 100644 (file)
index 0000000..15c4fe1
--- /dev/null
+++ b/src/model/CollisionBounds.hpp
@@ -0,0 +1,103 @@
+#ifndef BLANK_MODEL_COLLISIONBOUNDS_HPP_
+#define BLANK_MODEL_COLLISIONBOUNDS_HPP_
+
+#include "../graphics/BlockMesh.hpp"
+#include "../graphics/EntityMesh.hpp"
+#include "../graphics/OutlineMesh.hpp"
+
+#include <glm/glm.hpp>
+
+
+namespace blank {
+
+class AABB;
+class Ray;
+
+struct CollisionBounds {
+
+       /// 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 EntityMesh::Normal &VertexNormal(size_t idx) const noexcept { return vtx_nrm[idx]; }
+       EntityMesh::Normal VertexNormal(
+               size_t idx, const glm::mat4 &transform
+       ) const noexcept {
+               return EntityMesh::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(
+               EntityMesh::Buffer &out,
+               float tex_offset = 0.0f
+       ) const;
+       void Vertices(
+               EntityMesh::Buffer &out,
+               const glm::mat4 &transform,
+               float tex_offset = 0.0f,
+               EntityMesh::Index idx_offset = 0
+       ) const;
+       void Vertices(
+               BlockMesh::Buffer &out,
+               const glm::mat4 &transform,
+               float tex_offset = 0.0f,
+               BlockMesh::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
+       void Outline(OutlineMesh::Buffer &out) 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;
+
+       /// Check for intersection with given OBB.
+       /// The OBB is defined by box and box_M, M is applied to the shape.
+       virtual bool Intersects(
+               const glm::mat4 &M,
+               const AABB &box,
+               const glm::mat4 &box_M,
+               float &depth,
+               glm::vec3 &normal
+       ) const noexcept = 0;
+
+protected:
+       void SetShape(
+               const EntityMesh::Positions &pos,
+               const EntityMesh::Normals &nrm,
+               const EntityMesh::Indices &idx);
+       void SetTexture(
+               const BlockMesh::TexCoords &tex_coords);
+       void SetOutline(
+               const OutlineMesh::Positions &pos,
+               const OutlineMesh::Indices &idx);
+
+private:
+       EntityMesh::Positions vtx_pos;
+       EntityMesh::Normals vtx_nrm;
+       EntityMesh::Indices vtx_idx;
+
+       BlockMesh::TexCoords vtx_tex_coords;
+
+       OutlineMesh::Positions out_pos;
+       OutlineMesh::Indices out_idx;
+
+};
+
+}
+
+#endif