Newbie needs help: Creating animation that accesses 4*4-mat

hello,

I am working on a tool that generates COLLADA .dae-files specifiing an
animated model.
Since the local representation of the model’s motion is given by
distinct 44-transformation matrices applied to each node,
I am interested if there is a possibility to design an
<animation>-<channel> which accesses the whole matrix of a node and
replaces their entries
per each time step.
Is this possible in general (e.g. by a float4
4-accessor)?
Do you know a simple example-file which shows the right semantic to be
used for this problem?

thanks very much,

kudo


<node id="N">
  <matrix sid="M">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16</matrix>
...
<animation>
  ...
  <channel source="#matrix-sampler" target="N/M"/>
...

Yes, anytime you want to replace the entire value of the target just leave out any member selection like ‘.X’ or (11).

Thanks for your reply.

I tried to code it in an example animation, but still theres no movement at all. As testing environment i use the collada loader.

Animation:


<animation id="ANIMATION_hanim_r_shoulder">
			<source id="INPUTSOURCE_hanim_r_shoulder">
				<float_array id="INPUTSOURCEARRAY_hanim_r_shoulder" count="2">3 3.08333</float_array>
				<technique_common>
					<accessor count="2" source="#INPUTSOURCEARRAY_hanim_r_shoulder">
						<param name="TIME" type="float"/>
					</accessor>
				</technique_common>
			</source>
			<source id="OUTPUTSOURCE_hanim_r_shoulder">
				<float_array id="OUTPUTSOURCEARRAY_hanim_r_shoulder" count="32"> 0.346126 0.947696 -0.195225 -0.181 -0.937127 0.276711 -0.318226 0.3746 -0.240902 0.285214 0.957425 -0.061 0 0 0 1 0.3444 0.953384 -0.168795 -0.181 -0.841795 0.206335 -0.552133 0.3746 -0.478345 0.323309 0.850118 -0.061 0 0 0 1</float_array>
			</source>
		
			<sampler id="SAMPLER_hanim_r_shoulder">
				<input semantic="INPUT" source="#INPUTSOURCE_hanim_r_shoulder"/>
				<input semantic="OUTPUT" source="#OUTPUTSOURCE_hanim_r_shoulder"/>
			</sampler>
			<channel source="#SAMPLER_hanim_r_shoulder" target="hanim_r_shoulder/TRANSFORMATION_hanim_r_shoulder"/>
		</animation>

Node with matrix:

<node id="hanim_r_shoulder" >

						<matrix sid="TRANSFORMATION_hanim_r_shoulder">0.0538097 0.904206 -0.485346 -0.181 -0.4314 0.460915 0.810861 0.3746 0.931151 0.161288 0.403717 -0.061 0 0 0 1</matrix>
						<instance_geometry url="#GEOMETRY_hanim_r_shoulder">
							<bind_material>
								<technique_common>
									<instance_material symbol="BlueSG" target="#Blue"/>
								</technique_common>
							</bind_material>
						</instance_geometry>

Do you see what I am doing wrong?

Thanks in advance,

Kudo