itch.io

Sorry, I haven't opened itch for a long time. It wasn't until now that I saw your comment.

For the first question, you only need to set the parameters after updating the model parameters.

for example:

//update model

UltraModelUpdate(model, delta_time / 1000000);

if(mouse_check_button(mb_right)){

// If you want to set the parameters manually, you need to call UltraModelSetParameter after UltraModelUpdate.

// After setting, you need to call UltraModelUpdateParameter to apply the updates.

var dis = point_distance(room_width / 2, room_height / 2, mouse_x, mouse_y);

var dir = point_direction(room_width / 2, room_height / 2, mouse_x, mouse_y);

UltraModelSetParameter(model, "ParamAngleX", dis / 10 * dcos(dir), 1);

UltraModelSetParameter(model, "ParamAngleY", dis / 10 * dsin(dir), 1);

UltraModelUpdateParameter(model);

}

For the second question, you only need to set the xscl parameter to -1 when drawing the surface of the character.

for example:

surface_set_target(surface);

draw_clear_alpha(c_white, 0.0);

UltraModelDraw(model, mat_trans);

surface_reset_target();

draw_surface_ext(surface, 0, 0, -1, 1, 0, c_white, 1);

Hope this can clear up your confusion.