more methods for projection/culling projection matrices & frustum

ios/src/FilamentViewer.cpp

@@ -677,10 +677,8 @@ namespace polyvox
               .texture(RenderTarget::AttachmentPoint::DEPTH, _rtDepth)
               .build(*_engine);
 
-    // Make a specific viewport just for our render target
     _view->setRenderTarget(_rt);
-
-    Log("Set render target for texture id %u to %u x %u", texture, width, height);
+    Log("Created render target for texture id %u (%u x %u)", texture, width, height);
   }
 
   void FilamentViewer::destroySwapChain()
@@ -1109,6 +1107,30 @@ namespace polyvox
     cam.setModelMatrix(modelMatrix);
   }
 
+  void FilamentViewer::setCameraProjectionMatrix(const double *const matrix, double near, double far)
+  {
+    Camera &cam = _view->getCamera();
+
+    mat4 projectionMatrix(
+        matrix[0],
+        matrix[1],
+        matrix[2],
+        matrix[3],
+        matrix[4],
+        matrix[5],
+        matrix[6],
+        matrix[7],
+        matrix[8],
+        matrix[9],
+        matrix[10],
+        matrix[11],
+        matrix[12],
+        matrix[13],
+        matrix[14],
+        matrix[15]);
+    cam.setCustomProjection(projectionMatrix, near, far);
+  }
+
   const math::mat4 FilamentViewer::getCameraModelMatrix()
   {
     const auto &cam = _view->getCamera();
@@ -1127,6 +1149,12 @@ namespace polyvox
     return cam.getProjectionMatrix();
   }
 
+  const math::mat4 FilamentViewer::getCameraCullingProjectionMatrix()
+  {
+    const auto &cam = _view->getCamera();
+    return cam.getCullingProjectionMatrix();
+  }
+
   const filament::Frustum FilamentViewer::getCameraFrustum()
   {
     const auto &cam = _view->getCamera();

ios/src/FlutterFilamentApi.cpp

@@ -139,6 +139,19 @@ extern "C"
         memcpy(array, matrix.asArray(), 16 * sizeof(double));
         return array;
     }
+
+    const double *const get_camera_culling_projection_matrix(const void *const viewer)
+    {
+        const auto &matrix = ((FilamentViewer *)viewer)->getCameraCullingProjectionMatrix();
+        double *array = (double *)calloc(16, sizeof(double));
+        memcpy(array, matrix.asArray(), 16 * sizeof(double));
+        return array;
+    }
+
+    void set_camera_projection_matrix(const void *const viewer, const double* const matrix, double near, double far)
+    {
+        ((FilamentViewer *)viewer)->setCameraProjectionMatrix(matrix, near, far);
+    }
     
     const double *const get_camera_frustum(const void *const viewer)
     {