I dont get it (fade-in/fade-out)

OpenGL OpenGL: Basic Coding
1

I wana do a movie effect, i have read a topic here but i doesnt work.

CODE:

glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
(*glActiveTextureARB)(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_2D, texture[6]);

	glBlendFunc(GL_ONE,GL_ONE);
	
	glColor4f(1.0f,1.0f, 1.0f,blend);
	
	glBegin(GL_QUADS);
		glTexCoord2f(0.0f, 1.0f);	glVertex2f(0, 0);
		glTexCoord2f(0.0f, 0.0f);	glVertex2f(0, glnHeight);
		glTexCoord2f(1.0f, 0.0f);	glVertex2f(glnWidth, glnHeight);
		glTexCoord2f(1.0f, 1.0f);	glVertex2f(glnWidth, 0);
	glEnd();
	glDisable(GL_BLEND);

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i see a semi transparent white quad, i cant see my logo. blend goes from 0 to 1 and than back to 0.(black-mylogo-black) this is what i want.

2

Maybe some sample code/source code will help.

3

nvm i fixed it, was my bad

4

Yup, the second glBlendFunc shouldn’t have been there right.

5

yep i replaced the 2nd blendfuction with the 1st one and i also forgot to enable textures lol

New working code, of some one needs it

================================================

	glEnable(GL_BLEND); 

	(*glActiveTextureARB)(GL_TEXTURE1_ARB);
		glBindTexture(GL_TEXTURE_2D, texture[6]);

	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glColor4f(2.0f,2.0f, 2.0f, blend);
	
	glBegin(GL_QUADS);
		glTexCoord2f(0.0f, 1.0f);	glVertex2f(0, 0);
		glTexCoord2f(0.0f, 0.0f);	glVertex2f(0, glnHeight);
		glTexCoord2f(1.0f, 0.0f);	glVertex2f(glnWidth, glnHeight);
		glTexCoord2f(1.0f, 1.0f);	glVertex2f(glnWidth, 0);
	glEnd();
	glDisable(GL_BLEND);

==============================================

[This message has been edited by GL_ZERO (edited 08-18-2003).]