Elysian Shadows

ajtgarber wrote:Fade to black? Fade to another level/scene?

jjackdev wrote:Well I have implemented it but some stuff isn't working like when you have the fade it will just be pure black but when you press any of the keys it will actually do the fade. Any tips. I am using SDL and OpenGL with C++ with Xcode on a Mac.

void init()
{
    glEnable(GL_BLEND);
    glBlendFunc(GL_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // the alpha stuff
    // if in 2d, disable GL_DEPTH so the images behind will still show but if its 3d enable it
/// OTHER INITS
}
void fade(float alpha)
{
/// EDIT: ok it may look like this SDL_Delay(200); so it dosent faid so fast
     if(alpha < 1.f)
     { 
         glPushMatrix();
         glColor4f(0.f, 0.f, 0.f, alpha);
         // DRAW QUAD 
         glPopMatrix();
         fade(alpha + 0.1f);
     }
     // recursive method to fade the screen
}

jjackdev wrote:I tried your method WSPSNIPER but my computer froze. But here is the problem so I am testing a warp like thing like this.

Code: Select all

for (int i = 0; i < TILE_SOLID_COUNT; i++) {
			if (IsCollision(tileRect[i], playerRect) == true) {
				collision = true;
				if (i == 33) {
					x = 303;
					y = 223;
					alpha = 0.0f;
					fading = true;
					fade();
				}
				...
		}

//In the main loop
if (fading == true) {
		if (alpha < 1.0f) {
			alpha += 0.1f/350.0f;
			fade();
		}
		if (alpha > 1.0f) 
			fading = false;
	}

//Here is my fade function the alpha and fading variables are global
void fade()
{
	glBegin(GL_QUADS);
	glColor4f(0.0f, 0.0f, 0.0f, alpha);
	glVertex2f(0.0f, 0.0f);
	glVertex2f(640.0f, 0.0f);
	glVertex2f(640.0f, 480.0f);
	glVertex2f(0.0f, 480.0f);
	glEnd();
}
//Here is the wierd part when I do a keypress it works perfectly
if (event.key.keysym.sym == SDLK_d) {
						fading = true;
						alpha = 0.0f;
					}

Now for some reason I cannot get it to work when it collides then the fading happens it just is a continous black with no fade.

Thank you guys for all your help.

jjackdev wrote:I tried your method WSPSNIPER but my computer froze. But here is the problem so I am testing a warp like thing like this.

Code: Select all

for (int i = 0; i < TILE_SOLID_COUNT; i++) {
			if (IsCollision(tileRect[i], playerRect) == true) {
				collision = true;
				if (i == 33) {
					x = 303;
					y = 223;
					alpha = 0.0f;
					fading = true;
					fade();
				}
				...
		}

//In the main loop
if (fading == true) {
		if (alpha < 1.0f) {
			alpha += 0.1f/350.0f;
			fade();
		}
		if (alpha > 1.0f) 
			fading = false;
	}

//Here is my fade function the alpha and fading variables are global
void fade()
{
	glBegin(GL_QUADS);
	glColor4f(0.0f, 0.0f, 0.0f, alpha);
	glVertex2f(0.0f, 0.0f);
	glVertex2f(640.0f, 0.0f);
	glVertex2f(640.0f, 480.0f);
	glVertex2f(0.0f, 480.0f);
	glEnd();
}
//Here is the wierd part when I do a keypress it works perfectly
if (event.key.keysym.sym == SDLK_d) {
						fading = true;
						alpha = 0.0f;
					}

Now for some reason I cannot get it to work when it collides then the fading happens it just is a continous black with no fade.

Thank you guys for all your help.

jjackdev wrote:I fixed it in my code but it did not work? I just need a solution for my current solution.