make windows happy by avoiding storing the heightmap on the stack

fggl/data/heightmap.cpp

@@ -15,7 +15,7 @@ namespace fggl::data {
         const int gridOffset = sizeX * sizeY;
 
         // calculate normals for each triangle
-        math::vec3 triNormals[sizeX * sizeY * 2];
+        math::vec3* triNormals = new math::vec3[sizeX * sizeY * 2];
         for (int i = 0; i < sizeX - 1; i++) {
             for (int j = 0; j < sizeY - 1; j++) {
                 // calculate vertex
@@ -66,12 +66,15 @@ namespace fggl::data {
                 locations[idx(i, j, sizeY)].normal = glm::normalize(finalNormal) * -1.0f; //FIXME the normals seem wrong.
             }
         }
+        delete[] triNormals;
     }
 
     void generateHeightMesh(const data::HeightMap *heights, data::Mesh &mesh) {
 
         // step 1: convert height data into vertex locations
-        data::Vertex locations[data::heightMaxZ * data::heightMaxZ];
+        const int numElms = data::heightMaxX * data::heightMaxZ;
+        data::Vertex* locations = new data::Vertex[numElms];
+
         for (std::size_t x = 0; x < data::heightMaxX; x++) {
             for (std::size_t z = 0; z < data::heightMaxZ; z++) {
                 float level = heights->getValue(x, z);
@@ -88,9 +91,10 @@ namespace fggl::data {
         mesh.restartVertex = data::heightMaxZ * data::heightMaxX;
 
         // populate mesh
-        for (auto & location : locations) {
-            mesh.pushVertex(location);
+        for (auto i = 0; i < numElms; i++) {
+            mesh.pushVertex(locations[i]);
         }
+        delete[] locations;
 
         for (std::size_t x = 0; x < data::heightMaxX - 1; x++) {
             for (std::size_t z = 0; z < data::heightMaxZ; z++) {