private void readTechnique(Statement techStat) throws IOException {
isUseNodes = false;
String[] split = techStat.getLine().split(whitespacePattern);
String name;
if (split.length == 1) {
name = TechniqueDef.DEFAULT_TECHNIQUE_NAME;
} else if (split.length == 2) {
name = split[1];
} else {
throw new IOException("Technique statement syntax incorrect");
}
String techniqueUniqueName = materialDef.getAssetName() + "@" + name;
technique = new TechniqueDef(name, techniqueUniqueName.hashCode());
for (Statement statement : techStat.getContents()) {
readTechniqueStatement(statement);
}
technique.setShaderPrologue(createShaderPrologue(presetDefines));
switch (technique.getLightMode()) {
case Disable:
technique.setLogic(new DefaultTechniqueDefLogic(technique));
break;
case MultiPass:
technique.setLogic(new MultiPassLightingLogic(technique));
break;
case SinglePass:
technique.setLogic(new SinglePassLightingLogic(technique));
break;
case StaticPass:
technique.setLogic(new StaticPassLightingLogic(technique));
break;
case SinglePassAndImageBased:
technique.setLogic(new SinglePassAndImageBasedLightingLogic(technique));
break;
default:
throw new UnsupportedOperationException();
}
List<TechniqueDef> techniqueDefs = new ArrayList<>();
if (isUseNodes) {
nodesLoaderDelegate.computeConditions();
// used for caching later, the shader here is not a file.
// KIRILL 9/19/2015
// Not sure if this is needed anymore, since shader caching
// is now done by TechniqueDef.
technique.setShaderFile(
technique.hashCode() + "", technique.hashCode() + "", "GLSL100", "GLSL100");
techniqueDefs.add(technique);
} else if (shaderNames.containsKey(Shader.ShaderType.Vertex)
&& shaderNames.containsKey(Shader.ShaderType.Fragment)) {
if (shaderLanguages.size() > 1) {
for (int i = 1; i < shaderLanguages.size(); i++) {
TechniqueDef td = null;
try {
td = (TechniqueDef) technique.clone();
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
td.setShaderFile(shaderNames, shaderLanguages.get(i));
techniqueDefs.add(td);
}
}
technique.setShaderFile(shaderNames, shaderLanguages.get(0));
techniqueDefs.add(technique);
} else {
technique = null;
shaderLanguages.clear();
shaderNames.clear();
presetDefines.clear();
langSize = 0;
logger.log(Level.WARNING, "Fixed function technique was ignored");
logger.log(
Level.WARNING,
"Fixed function technique ''{0}'' was ignored for material {1}",
new Object[] {name, key});
return;
}
for (TechniqueDef techniqueDef : techniqueDefs) {
materialDef.addTechniqueDef(techniqueDef);
}
technique = null;
langSize = 0;
shaderLanguages.clear();
shaderNames.clear();
presetDefines.clear();
}
/**
* Called by {@link RenderManager} to render the geometry by using this material.
*
* <p>The material is rendered as follows:
*
* <ul>
* <li>Determine which technique to use to render the material - either what the user selected
* via {@link #selectTechnique(java.lang.String, com.jme3.renderer.RenderManager)
* Material.selectTechnique()}, or the first default technique that the renderer supports
* (based on the technique's {@link TechniqueDef#getRequiredCaps() requested rendering
* capabilities})
* <ul>
* <li>If the technique has been changed since the last frame, then it is notified via
* {@link Technique#makeCurrent(com.jme3.asset.AssetManager, boolean,
* java.util.EnumSet) Technique.makeCurrent()}. If the technique wants to use a shader
* to render the model, it should load it at this part - the shader should have all
* the proper defines as declared in the technique definition, including those that
* are bound to material parameters. The technique can re-use the shader from the last
* frame if no changes to the defines occurred.
* </ul>
* <li>Set the {@link RenderState} to use for rendering. The render states are applied in this
* order (later RenderStates override earlier RenderStates):
* <ol>
* <li>{@link TechniqueDef#getRenderState() Technique Definition's RenderState} - i.e.
* specific renderstate that is required for the shader.
* <li>{@link #getAdditionalRenderState() Material Instance Additional RenderState} - i.e.
* ad-hoc renderstate set per model
* <li>{@link RenderManager#getForcedRenderState() RenderManager's Forced RenderState} -
* i.e. renderstate requested by a {@link com.jme3.post.SceneProcessor} or
* post-processing filter.
* </ol>
* <li>If the technique {@link TechniqueDef#isUsingShaders() uses a shader}, then the uniforms
* of the shader must be updated.
* <ul>
* <li>Uniforms bound to material parameters are updated based on the current material
* parameter values.
* <li>Uniforms bound to world parameters are updated from the RenderManager. Internally
* {@link UniformBindingManager} is used for this task.
* <li>Uniforms bound to textures will cause the texture to be uploaded as necessary. The
* uniform is set to the texture unit where the texture is bound.
* </ul>
* <li>If the technique uses a shader, the model is then rendered according to the lighting mode
* specified on the technique definition.
* <ul>
* <li>{@link LightMode#SinglePass single pass light mode} fills the shader's light
* uniform arrays with the first 4 lights and renders the model once.
* <li>{@link LightMode#MultiPass multi pass light mode} light mode renders the model
* multiple times, for the first light it is rendered opaque, on subsequent lights it
* is rendered with {@link BlendMode#AlphaAdditive alpha-additive} blending and depth
* writing disabled.
* </ul>
* <li>For techniques that do not use shaders, fixed function OpenGL is used to render the model
* (see {@link GL1Renderer} interface):
* <ul>
* <li>OpenGL state ({@link FixedFuncBinding}) that is bound to material parameters is
* updated.
* <li>The texture set on the material is uploaded and bound. Currently only 1 texture is
* supported for fixed function techniques.
* <li>If the technique uses lighting, then OpenGL lighting state is updated based on the
* light list on the geometry, otherwise OpenGL lighting is disabled.
* <li>The mesh is uploaded and rendered.
* </ul>
* </ul>
*
* @param geom The geometry to render
* @param rm The render manager requesting the rendering
*/
public void render(Geometry geom, RenderManager rm) {
autoSelectTechnique(rm);
Renderer r = rm.getRenderer();
TechniqueDef techDef = technique.getDef();
if (techDef.getLightMode() == LightMode.MultiPass && geom.getWorldLightList().size() == 0) {
return;
}
if (rm.getForcedRenderState() != null) {
r.applyRenderState(rm.getForcedRenderState());
} else {
if (techDef.getRenderState() != null) {
r.applyRenderState(
techDef.getRenderState().copyMergedTo(additionalState, mergedRenderState));
} else {
r.applyRenderState(RenderState.DEFAULT.copyMergedTo(additionalState, mergedRenderState));
}
}
// update camera and world matrices
// NOTE: setWorldTransform should have been called already
if (techDef.isUsingShaders()) {
// reset unchanged uniform flag
clearUniformsSetByCurrent(technique.getShader());
rm.updateUniformBindings(technique.getWorldBindUniforms());
}
// setup textures and uniforms
for (int i = 0; i < paramValues.size(); i++) {
MatParam param = paramValues.getValue(i);
param.apply(r, technique);
}
Shader shader = technique.getShader();
// send lighting information, if needed
switch (techDef.getLightMode()) {
case Disable:
r.setLighting(null);
break;
case SinglePass:
updateLightListUniforms(shader, geom, 4);
break;
case FixedPipeline:
r.setLighting(geom.getWorldLightList());
break;
case MultiPass:
// NOTE: Special case!
resetUniformsNotSetByCurrent(shader);
renderMultipassLighting(shader, geom, rm);
// very important, notice the return statement!
return;
}
// upload and bind shader
if (techDef.isUsingShaders()) {
// any unset uniforms will be set to 0
resetUniformsNotSetByCurrent(shader);
r.setShader(shader);
}
r.renderMesh(geom.getMesh(), geom.getLodLevel(), 1);
}