refactor: fix file case

src/Gui/Viewport/GLMesh.cpp

@@ -0,0 +1,116 @@
+#include "Gui/Viewport/GLMesh.h"
+#include <GL/gl.h>
+#include <iostream>
+
+GLMesh::GLMesh()
+{
+    initializeOpenGLFunctions();
+    init();
+}
+
+void GLMesh::init()
+{
+    glGenVertexArrays(1, &vao);
+    glBindVertexArray(vao);
+
+    initBuffers();
+
+
+    // store data in the buffer
+    // glBufferData(GL_ARRAY_BUFFER, vertexPosData.size()*sizeof(GLfloat), vertexPosData.data(), GL_STATIC_DRAW);
+    // glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexData.size()*sizeof(GLint), indexData.data(), GL_STATIC_DRAW);
+
+
+    // unbind vertex array
+    glBindVertexArray(0);
+}
+
+void GLMesh::initBuffers()
+{
+
+    // create buffer of vertices
+    glGenBuffers(1, &vertexBuffer);
+    // set purpose
+    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
+
+    // gives the shader a way to read buffer data 
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(GLfloat), (void*)0);
+    // disable vertex attrib array
+    glEnableVertexAttribArray(0);
+
+    glGenBuffers(1, &indexBuffer);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
+
+}
+
+void GLMesh::setPosBuffer(std::vector<enzo::bt::Vector3> data)
+{
+    bind();
+    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
+    vertexPosData.clear();
+    std::cout << "pos data\n-------\n";
+    for(auto vector : data)
+    {
+        vertexPosData.push_back(vector.x());
+        vertexPosData.push_back(vector.y());
+        vertexPosData.push_back(vector.z());
+        std::cout << vector.x() << " " << vector.y() << " " << vector.z() << "\n";
+    }
+
+    glBufferData(GL_ARRAY_BUFFER, vertexPosData.size()*sizeof(GLfloat), vertexPosData.data(), GL_STATIC_DRAW);
+    unbind();
+}
+
+void GLMesh::setIndexBuffer(std::vector<int> pointIndices, std::vector<int> primVertexCounts)
+{
+    bind();
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
+    indexData.clear();
+    std::cout << "index pointIndices\n-------\n";
+    size_t startIndex = 1;
+
+    // create triangle fan from potentially ngon inputs
+    std::cout << "size: " << primVertexCounts.size() << "\n";
+    for(size_t primNum=0; primNum<primVertexCounts.size(); ++primNum)
+    {
+        int primVertexCount = primVertexCounts[primNum];
+
+        std::cout << "startIndex: " << startIndex << "\n";
+        std::cout << "prim vertex count: " << primVertexCount << "\n";
+
+        for(size_t pointIndex=startIndex; pointIndex+2<startIndex+primVertexCount; ++pointIndex)
+        {
+            indexData.push_back(pointIndices.at(startIndex-1));
+            indexData.push_back(pointIndices.at(pointIndex));
+            indexData.push_back(pointIndices.at(pointIndex+1));
+
+            std::cout << pointIndices.at(0) << " " << pointIndices.at(pointIndex) << " " << pointIndices.at(pointIndex+1) << "\n";
+        }
+
+        startIndex += primVertexCount;
+    }
+
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexData.size()*sizeof(GLint), indexData.data(), GL_STATIC_DRAW);
+    unbind();
+}
+
+
+void GLMesh::bind()
+{
+    glBindVertexArray(vao);
+}
+
+void GLMesh::unbind()
+{
+    glBindVertexArray(0);
+}
+
+void GLMesh::draw()
+{
+    bind();
+
+    // wireframe
+    glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+
+    glDrawElements(GL_TRIANGLES, indexData.size(), GL_UNSIGNED_INT, 0);
+}