camera_node passing the camera position to the shader

bevyengine · Dec 29, 2020 · eab9ac9 · eab9ac9
1 parent fb9fae0
commit eab9ac9
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/crates/bevy_render/src/render_graph/nodes/camera_node.rs b/crates/bevy_render/src/render_graph/nodes/camera_node.rs
@@ -114,15 +114,17 @@ pub fn camera_node_system(
  staging_buffer
  };
 
- let matrix_size = std::mem::size_of::<[[f32; 4]; 4]>();
- let camera_matrix: [f32; 16] =
- (camera.projection_matrix * global_transform.compute_matrix().inverse()).to_cols_array();
+ let camera_pos = &global_transform.translation;
+ let matrix_size = std::mem::size_of::<[[f32; 4]; 5]>();
+ let mut camera_matrix_array: Vec<f32> = (camera.projection_matrix * global_transform.compute_matrix().inverse()).to_cols_array().to_vec();
+ camera_matrix_array.extend_from_slice(&[camera_pos.x, camera_pos.y, camera_pos.z, 1.0]);
+ let camera_gpu_data = camera_matrix_array.as_slice();
 
  render_resource_context.write_mapped_buffer(
  staging_buffer,
  0..matrix_size as u64,
  &mut |data, _renderer| {
- data[0..matrix_size].copy_from_slice(camera_matrix.as_bytes());
+ data[0..matrix_size].copy_from_slice(camera_gpu_data.as_bytes());
  },
  );
  render_resource_context.unmap_buffer(staging_buffer);