animation using tutorial 15

I have studied video tutorial 15 and was trying to recreate a simple animation and export it.

- created a cube in blender
- created the animation and rendered it
- created a vertex group
- selected all
- ran the newest sio2_exporter.py script to export
- renamed and reconfigured the instances in the template.mm file of tutorial 15 to match the new animation.

Result: I get a blank screen when running the iPhone simulator. What am I missing?

What kind of animation you create in blender? A animation driven by IPOs or a Bone Animation with an armature?

I used IPOs.

sio2IpoPlay

sio2ResourceRender( ..., ..., SIO2_RENDER_IPO );

Do I have to create an .md2 file if I want to export an IPO animation to the iphone or is there another way to export?

Does your cube display without the IPO curves? If not, start there. Tutorial 14 is probably a better starting point for you, look at the camera IPO data. You can add IPO curves to any SIO2 object. I found it helpful to look into the .sio2 file raw data, check the ipo directory and files in there for the objects.

--yarri

yea, i can display a stationary cube. i pretty much do the following

sio2ResourceOpen( sio2->_SIO2resource, "cubemove.sio2", 1 );

sio2->_SIO2ipo = sio2IpoInit( "myIPO");

SIO2ipo *_SIO2ipo = sio2ResourceGetIpo( sio2->_SIO2resource, "object/Cube");

sio2->_SIO2ipo = _SIO2ipo;

sio2IpoPlay(_SIO2ipo);

sio2ResourceRender( sio2->_SIO2resource, sio2->_SIO2window, sio2->_SIO2camera, SIO2_RENDER_IPO );


it gets stuck in the function
void sio2IpoPlay( SIO2ipo *_SIO2ipo )
{ _SIO2ipo->state = SIO2_IPO_PLAY; }


what am i missing here? and is there an equivalent for sio2ObjectBuildAction for IPOs?

thanks

Yup... just bind all your IPO's in your loading function:
sio2ResourceBindAllIpos( sio2->_SIO2resource );

--yarri

Thanks for helping. I added that line inside the function templateLoading(void) right after the section

sio2ResourceOpen( sio2->_SIO2resource, "cubemove.sio2", 1 );
//sio2ResourceAdd( sio2->_SIO2resource,
while( i != sio2->_SIO2resource->gi.number_entry )
{
sio2ResourceExtract( sio2->_SIO2resource, NULL );
++i;
}
sio2ResourceClose( sio2->_SIO2resource );
sio2ResourceResetState();

but the program still crashes in the sio2PlayIPO. is that the wrong place or am i missing anything else?

Is your .sio2 file valid? What are you passing to sio2IpoPlay()? Could you use pastie.org and post some more code?

--yarri

I checked, my .sio2 file seems vaild. i looked at the folder and could find the object, lighting, camera as well as ipo files.

according to my understanding i load the resource, link it and play.

SIO2ipo *_SIO2ipo = sio2ResourceGetIpo( sio2->_SIO2resource, "ipo/ObIpo");
sio2->_SIO2ipo = _SIO2ipo;
sio2IpoPlay(sio2->_SIO2ipo);

i changed the parameter in the first line from "object/cube" to "ipo/ObIpo" and now the program doesn't crash anymore but i only see a black screen. is there any other step in between that i'm missing?

Render The ipo by passing the render ipo mask to the sio2resourcerender function just like in tutorial14

thanks so much, i finally got my first ipo animation running on the simulator

(mood: extremely happy)


PS: i was wondering though if there is an equivalent to

sio2ObjectBuildAction( _SIO2object, 45 , 115, "whatever" );

for IPOs, i.e. if i want to break down an animations into different sections.
i guess md2 is another possible approach for something like this.

dude I think you are mixing up everything...

IPOs: Affect location, rotation, scale of an SIO2transform (including physic matrix)

MD2: Per Vertex frame animation (all frames are exported)

SIO2 Animation: Per Vertex Linear interpolation animation based on armature (only necessary frames are exported)

oic... thanks for the info. sorry... i'm a bit new to game development.

i was wondering though if it is possible to break down the action in IPO animation by specifying the frames, just like in sio2ObjectBuildAction. at the moment i have one animation from blender and can only run the whole thing. (like i can't access sections of the animation)