Fix Look At Direction not recognized as direction mode

Fixes #56

Author: JannisX11

src/components/WarningDialog.vue

@@ -32,7 +32,7 @@ function validate() {
         errors.push({text: `The effect attempts to use opacity but the material is not set to 'Blend'`})
     }
 
-    if (Config.particle_appearance_facing_camera_mode.substr(0, 9) == 'direction' && Config.particle_appearance_direction_mode == 'derive_from_velocity') {
+    if (Config.particle_appearance_facing_camera_mode.includes('direction') && Config.particle_appearance_direction_mode == 'derive_from_velocity') {
         if (Config.particle_motion_mode == 'dynamic' && !(Config.particle_motion_linear_speed && parseFloat(Config.particle_motion_linear_speed) != 0)) {
             errors.push({text: `The particles are set to face a direction, but no speed is set. Only particles with an initial speed support directions`})
 

src/export.js

@@ -303,12 +303,13 @@ function generateFile() {
 	comps['minecraft:particle_kill_plane'] = getValue('particle_lifetime_kill_plane');
 
 	//Texture
+	let facing_camera_mode = getValue('particle_appearance_facing_camera_mode');
 	var tex_comp = comps['minecraft:particle_appearance_billboard'] = {
 		size: getValue('particle_appearance_size'),
-		facing_camera_mode: getValue('particle_appearance_facing_camera_mode'),
+		facing_camera_mode: facing_camera_mode,
 
 	}
-	if (getValue('particle_appearance_facing_camera_mode').substr(0, 9) == 'direction' &&
+	if ((facing_camera_mode.substring(0, 9) == 'direction' || facing_camera_mode == 'lookat_direction') &&
 		(getValue('particle_appearance_speed_threshold') != 0.01 || getValue('particle_appearance_direction_mode') != 'derive_from_velocity')
 	) {
 		tex_comp.direction = {