Fix GPUParticles2D emission offset in global coords

1 files changed, 8 insertions, 0 deletions

diff --git a/servers/rendering/renderer_rd/shaders/particles_copy.glsl b/servers/rendering/renderer_rd/shaders/particles_copy.glsl
index b991880cd9..afbd5a9caa 100644
--- a/servers/rendering/renderer_rd/shaders/particles_copy.glsl
+++ b/servers/rendering/renderer_rd/shaders/particles_copy.glsl
@@ -61,6 +61,8 @@ layout(push_constant, std430) uniform Params {
 	uint lifetime_split;
 	bool lifetime_reverse;
 	bool copy_mode_2d;
+
+	mat4 inv_emission_transform;
 }
 params;
 
@@ -199,6 +201,12 @@ void main() {
 			txform = txform * trail_bind_poses.data[part_ofs];
 		}
 
+		if (params.copy_mode_2d) {
+			// In global mode, bring 2D particles to local coordinates
+			// as they will be drawn with the node position as origin.
+			txform = params.inv_emission_transform * txform;
+		}
+
 		txform = transpose(txform);
 	} else {
 		txform = mat4(vec4(0.0), vec4(0.0), vec4(0.0), vec4(0.0)); //zero scale, becomes invisible