From da4d088d9d7abeb9e00aa6f165758e0e511bc555 Mon Sep 17 00:00:00 2001
From: Peder Bergebakken Sundt <pbsds@hotmail.com>
Date: Tue, 19 Mar 2019 20:18:13 +0100
Subject: [PATCH] Add texture coordinates to spheres

---
 src/utilities/shapes.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/utilities/shapes.cpp b/src/utilities/shapes.cpp
index 0a9a6b3..f64d3ff 100644
--- a/src/utilities/shapes.cpp
+++ b/src/utilities/shapes.cpp
@@ -216,10 +216,12 @@ Mesh generateSphere(float sphereRadius, int slices, int layers) {
     vector<vec3> vertices;
     vector<vec3> normals;
     vector<uint> indices;
+    vector<vec2> texcoords;
 
     vertices.reserve(3 * triangleCount);
     normals.reserve(3 * triangleCount);
     indices.reserve(3 * triangleCount);
+    texcoords.reserve(3 * triangleCount);
 
     // Slices require us to define a full revolution worth of triangles.
     // Layers only requires angle varying between the bottom and the top (a layer only covers half a circle worth of angles)
@@ -304,7 +306,14 @@ Mesh generateSphere(float sphereRadius, int slices, int layers) {
             indices.emplace_back(i + 3);
             indices.emplace_back(i + 4);
             indices.emplace_back(i + 5);
-
+            
+            texcoords.emplace_back( currentSliceAngleDegrees /360., currentAngleZDegrees /180. );
+            texcoords.emplace_back(    nextSliceAngleDegrees /360., currentAngleZDegrees /180. );
+            texcoords.emplace_back(    nextSliceAngleDegrees /360.,    nextAngleZDegrees /180. );
+            texcoords.emplace_back( currentSliceAngleDegrees /360., currentAngleZDegrees /180. );
+            texcoords.emplace_back(    nextSliceAngleDegrees /360.,    nextAngleZDegrees /180. );
+            texcoords.emplace_back( currentSliceAngleDegrees /360.,    nextAngleZDegrees /180. );
+            
             i += 6;
         }
     }
@@ -313,6 +322,7 @@ Mesh generateSphere(float sphereRadius, int slices, int layers) {
     mesh.vertices = vertices;
     mesh.normals = normals;
     mesh.indices = indices;
+    mesh.textureCoordinates = texcoords;
     return mesh;
 }