GU Help

[Stinkee2]

could anybody tell me which of these Line drawing methods are faster?

Using sceGuDrawArray()

sceGuStart(GU_DIRECT,list);
        sceGuDisable(GU_TEXTURE_2D);
        sceGuDisable(GU_DEPTH_TEST);
        lineVertex* Line = (lineVertex*)sceGuGetMemory(2 * sizeof(lineVertex));
        Line[0].color = color;
        Line[0].x = V1->X;
        Line[0].y = V1->Y;
        Line[0].z = 0.0f;
        Line[1].color = color;
        Line[1].x = V2->X;
        Line[1].y = V2->Y;
        Line[1].z = 0.0f;
        sceGuDrawArray(GU_LINES, GU_COLOR_8888 | GU_VERTEX_32BITF | GU_TRANSFORM_2D, 2, 0, Line);
        sceGuEnable(GU_DEPTH_TEST);
        sceGuEnable(GU_TEXTURE_2D);
        sceGuFinish();
        sceGuSync(0,0);

using Single Pixel Drawing Function

bool yLonger = false;
	    int incrementVal;
	    int shortLen = V2->Y - V1->Y;
	    int longLen = V2->X - V1->X;
	    if(abs(shortLen)>abs(longLen))
	    {
    		int swap=shortLen;
	    	shortLen=longLen;
		    longLen=swap;
		    yLonger=true;
	    }
	    if(longLen < 0)
	    {
	        incrementVal = -1;
	    }
	    else
	    {
            incrementVal = 1;
	    }
	    double divDiff;
	    if(shortLen == 0)
        {
            divDiff = longLen;
        }
	    else
	    {
	        divDiff = (double)longLen / (double)shortLen;
	    }
	    if(yLonger)
	    {
		    for (int i=0;i!=longLen;i+=incrementVal)
		    {
    			DPixel(color,Vect(V1->X+(int)((double)i/divDiff),V1->Y+i));
		    }
	    }
	    else
	    {
    		for(int i=0;i!=longLen;i+=incrementVal)
		    {
    			DPixel(color,Vect(V1->X+i,V1->Y+(int)((double)i/divDiff)));
		    }
	    }

also, I Cant get that first method to draw a filled Rectangle using GU_SPRITES, The rectangle just shows up black??

[PSdonkey]

Brick is going to rip you apart

[Stinkee2]

Why? What did I do? Is it because Im a Noob?

[Brick]

Originally Posted by Stinkee2

Why? What did I do? Is it because Im a Noob?

:-/ ... Donkey is just joking , unless you really believe that that's my role here [ /fp ].

Now , back to your "question" , isn't it just obvious that the first method is faster? Not to mention that
you use doubles and loops-over-loops(that putPixel method must be doing what i have in mind probably).

AND , it seems that you have no idea on how to enable/disable render states. You're doing everything the wrong way.
You disable something only if you don't need it , then you enable it back if it was needed by a previous task.

PSP isn't really for beginners , unless : 1) You pick an existing and easy to use library(oslib...for example)
2) You don't care that much to actually LEARN...

also, I Cant get that first method to draw a filled Rectangle using GU_SPRITES, The rectangle just shows up black??

Probably you dont bind any texture(if you use any) or a color.



Last thing : DONT USE DOUBLEzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz zz.Just floats,,,,....,,,,.

[Stinkee2]

Originally Posted by Brick

Last thing : DONT USE DOUBLEzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz zz.Just floats,,,,....,,,,.

I didnt make that second method, I got it from a code snippet. but carelessly forgot to revise it (other than changing some stuff for compatability).

Thanks for helping me once again Brick . So reliable!

[Stinkee2]

Im having one more problem now though...

sceGuStart(GU_DIRECT, list);
sceGuClearColor(color);
sceGuClearDepth(0);
sceGuClear(GU_COLOR_BUFFER_BIT|GU_DEPTH_BUFFER_BIT);
sceGuFinish();
sceGuSync(0,0);

that lowers the frame rate by like 30 frames!
What is going on here?

Edit:

Nevermind... it only slowed down that much on my emulator

Spoiler:

Originally Posted by Brick

Well , from what i can see , if that isn't running over 150fps , then you have an issue.

Quote came from This Post

just implemented FPS counter (Env->GetFPS()) and I was very suprised to see that I get 350+ FPS! heres a screenshot:




unfortunately, I get an unhandled exception after 2000 or so frames... .
EDIT Again:
just changed the way physics are calculated & some other graphics stuff now I get 500+fps .
now if only I could figure out why its crashing .

[Masteroid]

Far far far FAR from a noob! Brick just does what he does

[Brick]

Nevermind... it only slowed down that much on my emulator

Spoiler:

!!!!!!!!!!!!!!!!!@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@FLAME@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

now if only I could figure out why its crashing .

Judging by your latest source release , obviously you have more
memory leaks in your code and/or null pointers/accessing array elements out of range...

...You can use psplink , and addr2line to get the exact line(S) that cause this if you're having hard time tracking it.

The first thing you can try is to remove the debug text just to make sure that you have fixed the c-string leaks.

You're on your own now... :-)

[MTN]

you can decrease fps by using "sceDisplayWaitVblankStart()" at the end of your loop (if its causing problems)

[Brick]

Originally Posted by MTN

you can decrease fps by using "sceDisplayWaitVblankStart()" at the end of your loop (if its causing problems)

You do not need to limit fps. In the end , you'll get : + (fm = 4k/500fps) * (fmd = 500fps/60fps).
Just fix the issue and never limit the frames.
All you need is simple fdp-based movement(without accumulators/step iterators and stuff).