Forceshield – my very first shader

mifth · October 12, 2011, 1:14pm

Hi, @ficik ! Sorry for long reply. I was busy with some shaders writing:

http://hub.jmonkeyengine.org/groups/graphics/forum/topic/glsl-glass-shader-advice-is-needed/

http://hub.jmonkeyengine.org/groups/graphics/forum/topic/glsl-matcap-shader-advice-needed/

Also, I have put @theucher 's dissolve shader to the library.

Now, I’m ready to put your shader to my repository. But firstly, I have to make a usage example. So, I will try to make a simple example scene.

mifth · October 17, 2011, 8:39am

@ficik , I have added your shader to the shader library! Thanks to you again! It works perfectly.

http://code.google.com/p/jme-glsl-shaders/

There are 7 cool shaders in the repository. I think about JNP plugin and put it into the JMP-Contributions. I hope it will be helpful for other people.

nihal · January 26, 2012, 12:42pm

Oh my f*** god. Nerdgasm!

staugaard · January 26, 2012, 2:00pm

Nice work, ficik…

rompelstilchen · May 13, 2012, 1:34pm

@ficik said:
I just wrote my very first shader.. uff. It's force field which can display up to 8 hits.
demo:

I tried your shader but i get this error
i am not that familiar with shaders, so can you tell me where to get an update
i use tha latest version(07)

Code:

Grave: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main] com.jme3.renderer.RendererException: Shader link failure, shader:Shader[language=GLSL100, numSources=2, numUniforms=6, shaderSources=[ShaderSource[name=Shaders/ForceShield/Shield.vert, defines, type=Vertex], ShaderSource[name=Shaders/ForceShield/Shield.frag, defines, type=Fragment]]] info:Vertex info ----------- 0(24) : error C5025: lvalue in assignment too complex

Fragment info

0(33) : warning C7011: implicit cast from "int" to "float"
0(27) : error C6013: Only arrays of texcoords may be indexed in this profile, and only with a loop index variable

thx

normen · May 13, 2012, 3:44pm

Somewhere in the shader you have to replace a “0” with “0.0” or a “1” with “1.0”. Guess the author had a nvidia card, their driver compiles anything ^^

mifth · May 13, 2012, 4:40pm

@rompelstilchen , can you paste entire log (with lines of shader code). I’ll try to fix it.

Momoko_Fan · May 13, 2012, 5:09pm

You have loops with non-const number of iterations. GLSL 1.0 implementations don’t like that.

rompelstilchen · June 4, 2012, 10:29pm

@mifth said:
@rompelstilchen , can you paste entire log (with lines of shader code). I'll try to fix it.

hello

did you modify the code ?

sheers

mifth · June 5, 2012, 7:36am

@rompelstilchen no, I have been waiting for your ENTIRE LOG. There should be a very big log with shader lines.

rompelstilchen · June 5, 2012, 9:05am

@mifth i pasted the log already (see above)

or at least the only one i have

mifth · June 5, 2012, 10:10am

I need more with shader lines above the log. And you should install nightly updates, as shader debugger was implemented recently.

rompelstilchen · June 5, 2012, 10:16am

yes i have a question about that, if you please…

i have a svn checkout of jme but i don’t know what to copy and where once i have built it

i mean i am not sure what compiled libs ands stufs need to be copied to c:ProgramFilesjme… directory(windows)

here’s the log

Code:

juin 05, 2012 12:15:20 PM com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation Infos: Uniform m_GlowColor is not declared in shader [ShaderSource[name=Shaders/ToonBlow/ToonBlow_Edges.vert, defines, type=Vertex], ShaderSource[name=Shaders/ToonBlow/ToonBlow_Edges.frag, defines, type=Fragment]]. juin 05, 2012 12:15:20 PM com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation Infos: Uniform GlowColor is not declared in shader [ShaderSource[name=Shaders/LightBlow/LightBlow.vert, defines, type=Vertex], ShaderSource[name=Shaders/LightBlow/LightBlow.frag, defines, type=Fragment]]. juin 05, 2012 12:15:20 PM com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation Infos: Uniform m_GlowColor is not declared in shader [ShaderSource[name=Shaders/LightBlow/LightBlow.vert, defines, type=Vertex], ShaderSource[name=Shaders/LightBlow/LightBlow.frag, defines, type=Fragment]]. juin 05, 2012 12:15:21 PM com.jme3.app.Application handleError Grave: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main] com.jme3.renderer.RendererException: Shader link failure, shader:Shader[language=GLSL100, numSources=2, numUniforms=8, shaderSources=[ShaderSource[name=Shaders/ForceShield/Shield.vert, defines, type=Vertex], ShaderSource[name=Shaders/ForceShield/Shield.frag, defines, type=Fragment]]] info:Vertex info ----------- 0(24) : error C5025: lvalue in assignment too complex

Fragment info

0(33) : warning C7011: implicit cast from "int" to "float"
0(27) : error C6013: Only arrays of texcoords may be indexed in this profile, and only with a loop index variable

mifth · June 5, 2012, 12:58pm

i need much more log. Can you give me 500-700 lines of your log?

Momoko_Fan · June 5, 2012, 2:07pm

@mifth: If you’re expecting the shader dump, you won’t see it in this case because this is a linker error and not a compile error.

The issue is (as I have stated in the previous page), is that you cannot have complex control flow in a shader that claims to support GLSL 1.0.

This:

[java]uniform int m_SomeVariable;

// …

for (int i = 0; i < m_SomeVariable; i++) {

// …

}

[/java]

Is not acceptable in GLSL 1.0, m_SomeVariable is not constant and so the number of times the logic inside the loop has to execute is not known at compile time.

On the other hand replacing the uniform value with a constant, like so:

[java]const int m_SomeVariable = 123;[/java]

Is acceptable.

Another approach is to use defines to expose a constant in the shader. This way you can still set a value in the Material as before, but the value you have set becomes a compile time constant in the shader exposed through a “#define” statement at the top of the shader.

mifth · June 20, 2012, 4:42pm

I have an exception with nightly build:

LOG:

Jun 20, 2012 8:37:34 PM com.jme3.renderer.lwjgl.LwjglRenderer initialize

INFO: Caps: [FrameBuffer, FrameBufferMRT, FrameBufferMultisample, TextureMultisample, OpenGL20, OpenGL21, OpenGL30, OpenGL31, OpenGL32, ARBprogram, GLSL100, GLSL110, GLSL120, GLSL130, GLSL140, GLSL150, VertexTextureFetch, TextureArray, TextureBuffer, FloatTexture, FloatColorBuffer, FloatDepthBuffer, PackedFloatTexture, SharedExponentTexture, PackedFloatColorBuffer, TextureCompressionLATC, NonPowerOfTwoTextures, MeshInstancing, VertexBufferArray, PackedDepthStencilBuffer]

Jun 20, 2012 8:37:34 PM com.jme3.asset.DesktopAssetManager

INFO: DesktopAssetManager created.

Jun 20, 2012 8:37:34 PM com.jme3.renderer.Camera

INFO: Camera created (W: 640, H: 480)

Jun 20, 2012 8:37:34 PM com.jme3.renderer.Camera

INFO: Camera created (W: 640, H: 480)

Jun 20, 2012 8:37:34 PM com.jme3.input.lwjgl.LwjglMouseInput initialize

INFO: Mouse created.

Jun 20, 2012 8:37:34 PM com.jme3.input.lwjgl.LwjglKeyInput initialize

INFO: Keyboard created.

Jun 20, 2012 8:37:34 PM com.jme3.audio.lwjgl.LwjglAudioRenderer initInThread

INFO: AudioRenderer supports 64 channels

Jun 20, 2012 8:37:34 PM com.jme3.audio.lwjgl.LwjglAudioRenderer initInThread

INFO: Audio effect extension version: 1.0

Jun 20, 2012 8:37:34 PM com.jme3.audio.lwjgl.LwjglAudioRenderer initInThread

INFO: Audio max auxilary sends: 4

Jun 20, 2012 8:37:34 PM com.jme3.material.MaterialDef

INFO: Loaded material definition: Unshaded

Jun 20, 2012 8:37:35 PM com.jme3.scene.Node attachChild

INFO: Child (BitmapFont) attached to this node (null)

Jun 20, 2012 8:37:35 PM com.jme3.scene.Node detachAllChildren

INFO: Gui Node (Node): All children removed.

Jun 20, 2012 8:37:35 PM com.jme3.scene.Node attachChild

INFO: Child (BitmapFont) attached to this node (null)

Jun 20, 2012 8:37:35 PM com.jme3.scene.Node attachChild

INFO: Child (null) attached to this node (Gui Node)

Jun 20, 2012 8:37:35 PM com.jme3.app.Application handleError

SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]

java.lang.IllegalArgumentException: Material parameter is not defined: m_Color

at com.jme3.material.Material.checkSetParam(Material.java:442)

at com.jme3.material.Material.setParam(Material.java:458)

at com.jme3.material.Material.setColor(Material.java:615)

at ForceShield.Shield.simpleInitApp(Shield.java:41)

at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:225)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:129)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:205)

at java.lang.Thread.run(Thread.java:662)

Jun 20, 2012 8:37:35 PM com.jme3.renderer.lwjgl.LwjglRenderer cleanup

INFO: Deleting objects and invalidating state

Jun 20, 2012 8:37:35 PM com.jme3.input.lwjgl.LwjglMouseInput destroy

INFO: Mouse destroyed.

Jun 20, 2012 8:37:35 PM com.jme3.input.lwjgl.LwjglKeyInput destroy

INFO: Keyboard destroyed.

Jun 20, 2012 8:37:35 PM com.jme3.system.lwjgl.LwjglAbstractDisplay deinitInThread

INFO: Display destroyed.

BUILD SUCCESSFUL (total time: 22 seconds)

LINE: at ForceShield.Shield.simpleInitApp(Shield.java:41)

[java]

mat1.setColor("m_Color", ColorRGBA.randomColor());

[/java]

madjack · June 20, 2012, 5:02pm

@mifth said:
I have an exception with nightly build:

java.lang.IllegalArgumentException: Material parameter is not defined: m_Color

LINE: at ForceShield.Shield.simpleInitApp(Shield.java:41)
[java]
mat1.setColor("m_Color", ColorRGBA.randomColor());
[/java]

Use "Color", not "m_Color"

Addez · June 22, 2012, 2:18pm

This looks really good!

Cant wait to add it to my game

Would be really cool because it would protect against astroids and radiation and onces the shield runs out of energy

then red stuff starts to flash and beep and the controls will no longer react…

Man, this is a really great thing you’ve made! Good job!

rompelstilchen · June 22, 2012, 2:58pm

@mifth @Addez

i think a good idea, would be to mix this effect with a noise texture

only my opinion…

can’t wait to add it too

mifth · October 1, 2012, 2:44pm

@Addez , @rompelstilchen sorry for VERY VERY VERY long delay. I fixed the shader!

Just grab fragment and vertex shaders here:

http://code.google.com/p/jmonkeyplatform-contributions/source/detail?r=476