diff options
Diffstat (limited to 'gfx/models/mesh.h')
| -rw-r--r-- | gfx/models/mesh.h | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/gfx/models/mesh.h b/gfx/models/mesh.h index 248cb8f..f6a1bd2 100644 --- a/gfx/models/mesh.h +++ b/gfx/models/mesh.h @@ -1,5 +1,6 @@ #pragma once +#include "config/types.h" #include "gfx/gl/vertexArrayObject.h" #include <glArrays.h> #include <glad/gl.h> @@ -13,19 +14,32 @@ public: void Draw() const; void DrawInstanced(GLuint vao, GLsizei count, GLuint base = 0) const; + auto + minExtent() const + { + return min; + } + + auto + maxExtent() const + { + return max; + } + protected: - MeshBase(GLsizei m_numIndices, GLenum mode); + MeshBase(GLsizei m_numIndices, GLenum mode, std::pair<RelativePosition3D, RelativePosition3D> minmax); glVertexArray m_vertexArrayObject; glBuffers<2> m_vertexArrayBuffers; GLsizei m_numIndices; GLenum mode; + RelativePosition3D min, max; }; template<typename V> class MeshT : public MeshBase, public ConstTypeDefs<MeshT<V>> { public: MeshT(const std::span<const V> vertices, const std::span<const unsigned int> indices, GLenum mode = GL_TRIANGLES) : - MeshBase {static_cast<GLsizei>(indices.size()), mode} + MeshBase {static_cast<GLsizei>(indices.size()), mode, extent(vertices)} { VertexArrayObject::data(vertices, m_vertexArrayBuffers[0], GL_ARRAY_BUFFER); VertexArrayObject::data(indices, m_vertexArrayBuffers[1], GL_ARRAY_BUFFER); @@ -37,6 +51,21 @@ public: { return vao.addAttribsFor<V>(m_vertexArrayBuffers[0]).addIndices(m_vertexArrayBuffers[1]); } + + static auto + extent(const std::span<const V> vertices) + { + std::pair<decltype(V::pos), decltype(V::pos)> out {}; + for (glm::length_t D {}; D < 3; ++D) { + const auto mm + = std::minmax_element(vertices.begin(), vertices.end(), [D](const auto & va, const auto & vb) { + return va.pos[D] < vb.pos[D]; + }); + out.first[D] = mm.first->pos[D]; + out.second[D] = mm.second->pos[D]; + } + return out; + } }; using Mesh = MeshT<Vertex>; |