Added geo and gl packages from gogeline and improved documentation.

gl/vao.go

@@ -0,0 +1,39 @@
+package gl
+
+import (
+	"github.com/go-gl/gl/v4.5-core/gl"
+)
+
+// Vertex Array Object.
+type VAO struct {
+	id uint32
+}
+
+// Creates a new VAO.
+// Bind and use VBOs for rendering later.
+func NewVAO() *VAO {
+	vao := &VAO{}
+	gl.GenVertexArrays(1, &vao.id)
+
+	return vao
+}
+
+// Drops this VAO.
+func (v *VAO) Drop() {
+	gl.DeleteVertexArrays(1, &v.id)
+}
+
+// Binds VAO for rendering.
+func (v *VAO) Bind() {
+	gl.BindVertexArray(v.id)
+}
+
+// Unbinds.
+func (v *VAO) Unbind() {
+	gl.BindVertexArray(0)
+}
+
+// Returns the GL ID.
+func (v *VAO) GetId() uint32 {
+	return v.id
+}