Hi,
it looks that bmap_rendertarget does not clear its previous content with mode=0 as manual says.

Quote:
Mode for a normal render target bitmap, 1 = preserve previous content, 0 = clear previous content


here is an isolated example
Code:
#include <acknex.h>

BMAP *bmpRT;

function Render_to_bmap ()
{
	bmap_rendertarget ( bmpRT, 0, 0 );
	draw_quad ( NULL, vector(random(224),random(224),0), NULL, vector(32,32,0), NULL, vector(random(255),random(255),random(255)), 100, 0 );
	bmap_rendertarget ( NULL, 0, 0 );
}

function main()
{
	video_set ( 256, 256, 32, 2 );
	wait(3);
	bmpRT = bmap_createblack ( 256, 256, 32 );
	PANEL *panRT = pan_create ( "", 1 );
	panRT.bmap = bmpRT;
	panRT.flags |= SHOW;
	on_space = Render_to_bmap;
	while ( !key_esc ) wait(1);
	sys_exit(NULL);
}


is this a bug or a missundertanding?

thanks in advance,
txes

edited________________
I found the workaround

Code:
function Render_to_bmap ()
{
	bmap_rendertarget ( bmpRT, 0, 0 );
	wait(1);
	draw_quad ( NULL, vector(random(224),random(224),0), NULL, vector(32,32,0), NULL, vector(random(255),random(255),random(255)), 100, 0 );
	bmap_rendertarget ( NULL, 0, 0 );
}

but a bit weird.

Salud!

Last edited by txesmi; 09/18/12 21:24.