2 replies to this topic

[lester3857]

Can any help me?

surface_set_target(surface)//Set drawin surface
draw_clear_alpha(0,0); //Clear screen errors
with(xdat2_all_parent)//Choose Objects
{

//if not position_meeting(x,y-32,xdat2_all_parent)
draw_sprite_ext(sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,c_white,1)
draw_sprite_ext(sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,c_black,.7)
}
surface_reset_target()//restore surface to screen

The 2 sprites are drawn on the transparency of 0.7- Why? First draw it's on 1 and then on 0.7 alpha
I check the surface drawing alpha and image_alpha but dont work!
Please help me! Only happends on Surface!

Edited by lester3857, 05 July 2012 - 09:13 PM.

[Nocturne]

Surfaces are not drawn with a composite alpha, but rather takje the alpha of the last thing drawn on each pixel. It's a pain, but you will need to use a pre-multiplying technique...

surface_set_target(surface)//Set drawin surface
draw_clear_alpha(0,0); //Clear screen errors
with(xdat2_all_parent)//Choose Objects
{
//if not position_meeting(x,y-32,xdat2_all_parent)
draw_set_blend_mode_ext(bm_one, bm_inv_src_alpha);
draw_sprite_ext(sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,c_white,1)
draw_sprite_ext(sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,c_black,.7)
draw_set_blend_mode(bm_normal)
}
surface_reset_target()//restore surface to screen

Soemthing like that may work... For more information see this topic : http://gmc.yoyogames...howtopic=474273

[lester3857]

Surfaces are not drawn with a composite alpha, but rather takje the alpha of the last thing drawn on each pixel. It's a pain, but you will need to use a pre-multiplying technique...

surface_set_target(surface)//Set drawin surface
draw_clear_alpha(0,0); //Clear screen errors
with(xdat2_all_parent)//Choose Objects
{
//if not position_meeting(x,y-32,xdat2_all_parent)
draw_set_blend_mode_ext(bm_one, bm_inv_src_alpha);
draw_sprite_ext(sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,c_white,1)
draw_sprite_ext(sprite_index,image_index,x,y,image_xscale,image_yscale,image_angle,c_black,.7)
draw_set_blend_mode(bm_normal)
}
surface_reset_target()//restore surface to screen

Soemthing like that may work... For more information see this topic : http://gmc.yoyogames...howtopic=474273

thanks! Works Fine! Thanks man!

Edited by lester3857, 06 July 2012 - 07:46 PM.