Max # of Point Sprites 30 fps
Author
Hi everyone,
I was just wondering what's max # of sprites you can have before you dip below 30fps on a iPhone 3G.
With my current implementation using OpenGL point sprites. I can get to about 700 sprites before it dips below.
At around 5000 sprites it goes to around 6-7 fps.
Is this the limitation of the system or is there another way to draw more sprites?
Thanks for the replies,
Over 9000!
[edit]How are you currently drawing the sprites? Do you lock/unlock any buffers each frame?
[edit]How are you currently drawing the sprites? Do you lock/unlock any buffers each frame?
Author
Im just using glDrawElements(GL_POINTS ...) to do them, I did not lock or unlock any buffers (not too sure how this ones goes?)
I think i got it up too 2000 at 30fps, using some demo I found off the internet. That was on the iPod Touch though.
-ddn
-ddn
Author
I looked up some code using VBOs can someone give me a hand? I can't get it to render:
Where:
vertex:137.000000,113.000000,157.000000,113.000000,137.000000,133.000000,157.000000,133.000000
uv:0.000000,0.000000,0.500000,0.000000,0.000000,0.500000,0.500000,0.500000
color:214,50,20,60,214,50,20,60,214,50,20,60,214,50,20,60
index:0,1,2,1,2,3
init(){GLuint vboIDs[4];glGenBuffers(4 ,vboIDs); //create 3 vbos//verticesglBindBuffer(GL_ARRAY_BUFFER, vboIDs[0]);glBufferData(GL_ARRAY_BUFFER, blotCount*8, blotVertex, GL_STATIC_DRAW); //texturesglBindBuffer(GL_ARRAY_BUFFER, vboIDs[1]);glBufferData(GL_ARRAY_BUFFER, blotCount*8, blotVertex, GL_STATIC_DRAW); //colorsglBindBuffer(GL_ARRAY_BUFFER, vboIDs[2]);glBufferData(GL_ARRAY_BUFFER, blotCount*16, blotColor, GL_STATIC_DRAW);//indexesglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboIDs[3]);glBufferData(GL_ELEMENT_ARRAY_BUFFER, 6*blotCount, blotTriangle, GL_STATIC_DRAW);//reset so other's can draw firstglBindBuffer(GL_ARRAY_BUFFER, 0);glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);}draw(){ glEnableClientState(GL_VERTEX_ARRAY); glEnableClientState(GL_COLOR_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); //vertices glBindBuffer(GL_ARRAY_BUFFER, vboIDs[0]); glVertexPointer(2, GL_FLOAT, 0, 0); //textures glBindBuffer(GL_ARRAY_BUFFER, vboIDs[1]); glTexCoordPointer(2, GL_FLOAT, 0, 0); //colors glBindBuffer(GL_ARRAY_BUFFER, vboIDs[2]); glColorPointer(4, GL_UNSIGNED_BYTE, 0, 0); //textures glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboIDs[3]); glDrawElements(GL_TRIANGLES, 6*blotCount, GL_UNSIGNED_SHORT, 0); glBindBuffer(GL_ARRAY_BUFFER, 0); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);}Where:
vertex:137.000000,113.000000,157.000000,113.000000,137.000000,133.000000,157.000000,133.000000
uv:0.000000,0.000000,0.500000,0.000000,0.000000,0.500000,0.500000,0.500000
color:214,50,20,60,214,50,20,60,214,50,20,60,214,50,20,60
index:0,1,2,1,2,3
You want to draw billboard sprites instead and sort them per texture. Should be able to draw a whole lot more :)
Author
thanks for the reply,
mine are already sorted by texture.
just as draw elements its not fast enough
and I cant get VBOs to work.
mine are already sorted by texture.
just as draw elements its not fast enough
and I cant get VBOs to work.
Check out the OOlong engine it has a point sprite implementation. For the iPhone you have to use some extensions to enable them (using VBOs)
http://oolongengine.com/
Also you can check out this post from another forum :
http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=258029
he posted a small small code of point sprite rendering.
Good Luck!
-ddn
http://oolongengine.com/
Also you can check out this post from another forum :
http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=258029
he posted a small small code of point sprite rendering.
Good Luck!
-ddn
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
