Comments on: Step 14: HLSL. Writing pixel shader effect. http://www.ludumdare.com/compo/2009/04/19/step-14-hlsl-writing-pixel-shader-effect/ A tri-annual 48 hour solo game development competition. Fri, 10 Feb 2012 10:55:37 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: mathias http://www.ludumdare.com/compo/2009/04/19/step-14-hlsl-writing-pixel-shader-effect/comment-page-1/#comment-5783 mathias Sun, 19 Apr 2009 20:28:26 +0000 http://www.ludumdare.com/compo/?p=5593#comment-5783 Well, with opengl it would be something like this in the fragment shader, I guess: uniform sampler2D texUnit0; uniform int alpha; void main(void) { vec4 color; color = texture2D(texUnit0, gl_TexCoord[0].xy); if(color.a != 255) color.a = alpha; // dont fade the pixels in that are meant to be transparent? gl_FragColor = color; } Dunno, just typed that out of my head and it is no use for you anyways since you need a HLSL snippet.. but what the hell? Well, with opengl it would be something like this in the fragment shader, I guess:

uniform sampler2D texUnit0;
uniform int alpha;

void main(void) {
vec4 color;
color = texture2D(texUnit0, gl_TexCoord[0].xy);
if(color.a != 255) color.a = alpha; // dont fade the pixels in that are meant to be transparent?

gl_FragColor = color;
}

Dunno, just typed that out of my head and it is no use for you anyways since you need a HLSL snippet.. but what the hell?

]]> By: jph http://www.ludumdare.com/compo/2009/04/19/step-14-hlsl-writing-pixel-shader-effect/comment-page-1/#comment-5782 jph Sun, 19 Apr 2009 20:21:18 +0000 http://www.ludumdare.com/compo/?p=5593#comment-5782 humm,. can't you do it with a simple alpha fade,. or colour shift? I have used both to good effect,. you also could draw a big sprite to fill the screen and fade it in or fade all the rest out,. . . humm,. can’t you do it with a simple alpha fade,. or colour shift? I have used both to good effect,. you also could draw a big sprite to fill the screen and fade it in or fade all the rest out,. . .

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