Le Samedi 18 Février 2006 17:31, Jorrit Tyberghein a écrit :
> The easiest way is to use engine->CreateMeshWrapper(). This is
> actually documented in the manual. Check the using cs/engine/meshobj
> section where it is explained how you can in general create a mesh
> from a factory.
>
> Greetings,
I finally found my mistake: the 'particles' mesh object itself doesn't
provide the iParticleState interface, but rather iParticlesObjectState.
Here's the code I used to load the factory, set the particles_simple.xml
shader (only way to get a material instead some dots and get rid of some
visibility problem, it seems), then get the state interface:
// get the material and assign it the particle_basic shader as standard type
loader->LoadTexture ("nuage2", "/xd/textures/nuage2.png");
csRef<iMaterialWrapper> particlemat =
engine->GetMaterialList ()->FindByName ("nuage2");
if (!particlemat)
return ReportError ("Unable to load nuage2 material!");
if (!loader->LoadShader ("/shader/particle_basic.xml"))
return ReportError ("Unable to load /shader/particle_basic.xml!");
csRef<iStringSet> strings = CS_QUERY_REGISTRY_TAG_INTERFACE (
object_reg, "crystalspace.shared.stringset", iStringSet);
csRef<iShaderManager> shader_mgr = CS_QUERY_REGISTRY (object_reg,
iShaderManager);
if (!shader_mgr)
return ReportError ("Unable to get shader manager!");
iShader* particle_shader = shader_mgr->GetShader ("particle_basic");
if (!particle_shader)
return ReportError ("Unable to get particle_basic shader!");
particlemat->GetMaterial ()->SetShader (strings->Request ("standard"),
particle_shader);
// load the factory for particles from file
csRef<iMeshFactoryWrapper> factoryw = loader->LoadMeshObjectFactory (
"/xd/models/thrusterparticles");
if (!factoryw)
return ReportError ("Unable to load thrusterparticles!");
// Initialize the particles mesh object(s) used for thruster(s).
emitters.Empty ();
size_t i = 0;
csString pattern;
keybase = cfgkey + "ThrusterUnit.";
while (config->SubsectionExists (pattern.Format (keybase + "%d.", i)))
{
ThrustersInfos* infos = new ThrustersInfos (); // the csObject
csRef<iMeshObjectFactory> objectfactory =
factoryw->GetMeshObjectFactory ();
csRef<iParticlesFactoryState> factorystate =
scfQueryInterface<iParticlesFactoryState> (objectfactory);
if (!factorystate)
return ReportError ("Unable to get factory state!");
factorystate->SetMixMode (CS_FX_ADD);
infos->position = GetConfigVector (config, pattern + "PositionStart",
"0,0,2");
csString meshname;
infos->meshw = engine->CreateMeshWrapper (factoryw,
meshname.Format ("ThrusterEmitter%d", i),
pccamera->GetCamera ()->GetSector (),
infos->position);
if (!infos->meshw)
return ReportError ("Unable to create particle meshwrapper!");
infos->meshw->SetZBufMode (CS_ZBUF_TEST);
infos->meshw->SetRenderPriority (engine->GetRenderPriority ("alpha"));
infos->meshw->GetMeshObject ()->SetMaterialWrapper (particlemat);
// Set a name for the csObject so it's easier to find it later
infos->SetName (meshname.GetData ());
infos->state = SCF_QUERY_INTERFACE (infos->meshw->GetMeshObject (),
iParticlesObjectState);
[...]
Et voila.
Thank you
> On 2/18/06, Vincent Knecht <[EMAIL PROTECTED]> wrote:
> > Hi !
> >
> > I'm trying to create particle systems from code, using a factory from a
> > file... I've tried many combinations, but I'm lost.
> > How to do that ?
> >
> > The following code fails on getting iParticleState:
> >
> > csRef<iMeshFactoryWrapper> factoryw = loader->LoadMeshObjectFactory (
> > "/xd/models/thrusterparticles");
> > if (!factoryw)
> > return ReportError ("Unable to load thrusterparticles!");
> >
> > // Initialize the emitter mesh object(s) used for thruster(s).
> > emitters.Empty ();
> > size_t i = 0;
> > csString pattern;
> > keybase = cfgkey + "ThrusterUnit.";
> > while (config->SubsectionExists (pattern.Format (keybase + "%d.", i)))
> > {
> > ThrustersInfos* infos = new ThrustersInfos (); // a csObject
> > /* that doesn't work neither
> > csString meshname;
> > infos->meshw = engine->CreateMeshWrapper (factoryw,
> > meshname.Format ("ThrusterEmitter%d", i),
> > pccamera->GetCamera ()->GetSector (),
> > csVector3 (0.0f, 0.0f, 0.0f));
> > */
> > infos->meshw = factoryw->CreateMeshWrapper ();
> > if (!infos->meshw)
> > return ReportError ("Unable to create particle meshwrapper!");
> > ///engine->AddMeshAndChildren (infos->meshw);
> > //infos->SetName (meshname.GetData ());
> > // is messing with iMeshObject really needed ?
> > csRef<iMeshObject> meshobject =
> > factoryw->GetMeshObjectFactory ()->NewInstance ();
> > infos->meshw->SetMeshObject (meshobject);
> > engine->AddMeshAndChildren (infos->meshw);
> >
> > infos->state = SCF_QUERY_INTERFACE (infos->meshw->GetMeshObject (),
> > iParticleState);
> > if (!infos->state)
> > return ReportError ("Unable to get iParticleState!");
> > [...]
> >
> > just in case:
> > ===== /xd/models/thrusterparticles ===================
> > <!-- <library> -->
> > <meshfact name="thrusterFACT">
> > <plugin>crystalspace.mesh.loader.factory.particles</plugin>
> > <params>
> > <emitter type="sphere">
> > <time>300</time>
> > <innerradius>0.01</innerradius>
> > <outerradius>0.03</outerradius>
> > <force type="linear">
> > <direction x="0.5" y="1" z="0"/>
> > <amount>10</amount>
> > <range>3.0</range>
> > <falloff>linear</falloff>
> > </force>
> > </emitter>
> > <dampener>0.1</dampener>
> > <mass>5</mass>
> > <massvariation>2.5</massvariation>
> > <pps>50</pps>
> > <initial>0</initial>
> > <gravity x="0" y="-1" z="0"/>
> > <diffusion>0.1</diffusion>
> > <radius>0.1</radius>
> > <ttl>5</ttl>
> > <zsort>yes</zsort>
> > <timevariation>0.5</timevariation>
> > <colormethod type="linear">
> > <gradient>
> > <color red="0" green="0" blue="1"/>
> > <color red="0" green="0.5" blue="1"/>
> > <color red="1" green="1" blue="1"/>
> > </gradient>
> > </colormethod>
> > </params>
> > </meshfact>
> > <!-- </library> -->
> > ==================================
> >
> > TIA
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