base setup for osx in place

engine/shape.cpp

@@ -0,0 +1,38 @@
+#include "pch.h"
+#include "shape.hpp"
+
+void Shape::create_buffers(GLvoid* idx, GLvoid* vertices, int isize, int vsize)
+{
+    glGenBuffers(2, buffers);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, isize, idx, GL_STATIC_DRAW);
+    glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
+    glBufferData(GL_ARRAY_BUFFER, vsize, vertices, GL_STATIC_DRAW);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    
+    glGenVertexArrays(2, arrays);
+    
+    for (int i = 0; i < 2; i++)
+    {
+        glBindVertexArray(arrays[i]);
+        glEnableVertexAttribArray(0);
+        glEnableVertexAttribArray(1);
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
+        glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
+        glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)0);
+        glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, uvs));
+    }
+    
+    glBindVertexArray(0);
+}
+void Shape::draw_fill() const
+{
+    glBindVertexArray(arrays[0]);
+    glDrawElements(GL_TRIANGLES, count[0], GL_UNSIGNED_SHORT, ioff[0]);
+}
+void Shape::draw_stroke() const
+{
+    glBindVertexArray(arrays[1]);
+    glDrawElements(GL_LINES, count[1], GL_UNSIGNED_SHORT, ioff[1]);
+}