diff options
Diffstat (limited to 'gfx/models/mesh.cpp')
| -rw-r--r-- | gfx/models/mesh.cpp | 70 |
1 files changed, 38 insertions, 32 deletions
diff --git a/gfx/models/mesh.cpp b/gfx/models/mesh.cpp index 4a3d9d4..25a4b58 100644 --- a/gfx/models/mesh.cpp +++ b/gfx/models/mesh.cpp @@ -1,41 +1,19 @@ #include "mesh.h"
-#include "obj_loader.h"
+#include "obj.h"
#include "vertex.hpp"
-#include <memory>
+#include <algorithm>
+#include <glm/glm.hpp>
+#include <iterator>
+#include <resource.h>
#include <vector>
-Mesh::Mesh(const std::string & fileName) : Mesh(OBJModel(fileName).ToIndexedModel()) { }
+Mesh::Mesh(const std::filesystem::path & fileName) : Mesh(ObjParser {Resource::mapPath(fileName)}) { }
-Mesh::Mesh(const IndexedModel & model) :
- m_vertexArrayObject {}, m_vertexArrayBuffers {}, m_numIndices {model.indices.size()}, mode {GL_TRIANGLES}
-{
- glGenVertexArrays(1, &m_vertexArrayObject);
- glBindVertexArray(m_vertexArrayObject);
-
- glGenBuffers(NUM_BUFFERS, m_vertexArrayBuffers.data());
-
- glBindBuffer(GL_ARRAY_BUFFER, m_vertexArrayBuffers[POSITION_VB]);
- glBufferData(
- GL_ARRAY_BUFFER, sizeof(model.positions[0]) * model.positions.size(), &model.positions[0], GL_STATIC_DRAW);
- glEnableVertexAttribArray(0);
- glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
-
- glBindBuffer(GL_ARRAY_BUFFER, m_vertexArrayBuffers[TEXCOORD_VB]);
- glBufferData(
- GL_ARRAY_BUFFER, sizeof(model.texCoords[0]) * model.texCoords.size(), &model.texCoords[0], GL_STATIC_DRAW);
- glEnableVertexAttribArray(1);
- glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
+Mesh::Mesh(const ObjParser & obj) : Mesh(packObjParser(obj), GL_TRIANGLES) { }
- glBindBuffer(GL_ARRAY_BUFFER, m_vertexArrayBuffers[NORMAL_VB]);
- glBufferData(GL_ARRAY_BUFFER, sizeof(model.normals[0]) * model.normals.size(), &model.normals[0], GL_STATIC_DRAW);
- glEnableVertexAttribArray(2);
- glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
-
- glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_vertexArrayBuffers[INDEX_VB]);
- glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(model.indices[0]) * model.indices.size(), &model.indices[0],
- GL_STATIC_DRAW);
-
- glBindVertexArray(0);
+Mesh::Mesh(std::pair<std::vector<Vertex>, std::vector<unsigned int>> && vandi, GLenum m) :
+ Mesh(vandi.first, vandi.second, m)
+{
}
Mesh::Mesh(std::span<Vertex> vertices, std::span<unsigned int> indices, GLenum m) :
@@ -64,6 +42,34 @@ Mesh::Mesh(std::span<Vertex> vertices, std::span<unsigned int> indices, GLenum m glBindVertexArray(0);
}
+Mesh::Data
+Mesh::packObjParser(const ObjParser & obj)
+{
+ std::vector<Vertex> vertices;
+ std::vector<ObjParser::FaceElement> vertexOrder;
+ std::vector<unsigned int> indices;
+ std::for_each(obj.faces.begin(), obj.faces.end(), [&](const ObjParser::Face & face) {
+ for (auto idx = 2U; idx < face.size(); idx += 1) {
+ auto f = [&](auto idx) {
+ const auto & fe {face[idx]};
+ if (const auto existing = std::find(vertexOrder.begin(), vertexOrder.end(), fe);
+ existing != vertexOrder.end()) {
+ indices.push_back(std::distance(vertexOrder.begin(), existing));
+ }
+ else {
+ indices.push_back(vertices.size());
+ vertices.emplace_back(obj.vertices[fe.x - 1], obj.texCoords[fe.y - 1], -obj.normals[fe.z - 1]);
+ vertexOrder.emplace_back(fe);
+ }
+ };
+ f(0);
+ f(idx);
+ f(idx - 1);
+ }
+ });
+ return std::make_pair(vertices, indices);
+}
+
Mesh::~Mesh()
{
glDeleteBuffers(NUM_BUFFERS, m_vertexArrayBuffers.data());
|