Hi!! I did a matcap shader for JME3. The shader is used seldom in gamedev, but it’s used in blender, zbrush… and it willbe very useful for scrollshooters to imitate different materials like glass, gold, metals, toon shader…
The shader does not use any lights… only one texture. So, it’s good for productivity.
The shader does not use UV coordinates, but it uses model’s normals/tangets/binormals and screen coordinates (as far as I understand).
I did a matcap shader! It is in the shaderBlow’s mercurial repository.
repository: http://code.google.com/p/jme-glsl-shaders/
MatCap textures library: http://www.pixologic.com/zbrush/downloadcenter/library/
MatCap Generator: http://bensimonds.com/2010/07/30/matcap-generator/
http://dl.dropbox.com/u/26887202/123/ShaderBlow_matcap.jpg
You have the normal, now you need to convert that to UV so you can read from the texture. One way is by using sphere mapping. jME3 has a GLSL function called “Optics_SphereCoord” that can be used for that in Optics.glsllib
Thanks for answering!!! I think sphere mapping is not what I need. But the solution could be very easy. I found a program “Sculptris”. It uses glsl for MatCap (material capture). Here is its shader.
vertex
[java]/
uniform vec3 light1_dir;
uniform vec3 light2_dir;
uniform vec3 observer_pos;
uniform float object_invscale;
/
uniform float texturesize;
varying vec3 normal;
varying vec3 cull_normal;
varying vec4 color;
varying vec3 tangent;
varying vec3 binormal;
attribute vec3 app_Tangent;
void main()
{
// normal=gl_Normal.xyz;
// position=gl_Vertex.xyzobject_invscale;
color=gl_Color;
// gl_TexCoord[0]=gl_MultiTexCoord0;
// gl_TexCoord[0]=gl_MultiTexCoord0-vec4(0.5/256, 0.5/256, 0, 0); // compensate for bumpmap emboss offset - TODO: uniform for texture size
// gl_TexCoord[0]=gl_MultiTexCoord0-vec4(0.5/512, 0.5/512, 0, 0); // compensate for bumpmap emboss offset - TODO: uniform for texture size
// gl_TexCoord[0]=gl_MultiTexCoord0-vec4(0.5/1024, 0.5/1024, 0, 0); // compensate for bumpmap emboss offset - TODO: uniform for texture size
gl_TexCoord[0]=gl_MultiTexCoord0-vec4(0.5/texturesize, 0.5/texturesize, 0, 0); // compensate for bumpmap emboss offset
gl_TexCoord[1]=gl_MultiTexCoord0; // no uv compensation for colortexture
gl_Position=ftransform();
normal=normalize(gl_NormalMatrixgl_Normal.xyz);
vec3 tpos=(gl_ModelViewMatrixgl_Vertex).xyz;
vec3 nm_z=normalize(tpos);
vec3 nm_x=cross(nm_z, vec3(0,1,0));
vec3 nm_y=cross(nm_x, nm_z);
cull_normal=vec3(dot(normal, nm_x), dot(normal, nm_y), dot(normal, nm_z));
tangent=normalize(gl_NormalMatrixapp_Tangent);
binormal=cross(normal, tangent);
// binormal=normalize(cross(normal, tangent));
// tangent=cross(binormal, normal);
}
[/java]
fragment:
[java]uniform sampler2D materialtex;
uniform sampler2D normaltex;
uniform sampler2D colortex;
uniform float backfaces;
/
varying vec3 light1_vector;
varying vec3 light2_vector;
varying vec3 eye_vector;
/
varying vec3 normal;
varying vec3 cull_normal;
varying vec3 tangent;
varying vec3 binormal;
varying vec4 color;
//varying vec3 position;
//varying vec2 texcoords;
vec3 nnormal;
void main()
{
vec3 tnormal=texture2D(normaltex, gl_TexCoord[0].st).xyz;
tnormal=(tnormal-vec3(0.5, 0.5, 0.5))2.0;
nnormal=normalize(tangenttnormal.x + binormaltnormal.y + normaltnormal.z);
// overlay vertex color (selection, mask)
// outcolor+=color;
vec2 lightmap_coords=nnormal.xy0.495+vec2(0.5, 0.5);
lightmap_coords.y=-1.0;
vec4 shade=texture2D(materialtex, lightmap_coords);
vec4 color=texture2D(colortex, gl_TexCoord[1].st);
vec4 multfactor=shade2;
vec4 screenfactor=multfactor-vec4(1,1,1,1);
multfactor=min(multfactor, vec4(1,1,1,1));
screenfactor=max(screenfactor, vec4(0,0,0,0));
color=vec4(1,1,1,1)-(vec4(1,1,1,1)-color)(vec4(1,1,1,1)-screenfactor);
gl_FragColor=colormultfactor;
// gl_FragColor=color;
if(backfaces>0.5 && normalize(cull_normal).z>0.07) // backfacing
{
// gl_FragColor=0.3;
// gl_FragColor.w=1.0;
float c=(gl_FragColor.x+gl_FragColor.y+gl_FragColor.z)*0.1;
gl_FragColor=vec4(c, c, c, 1);
}
// gl_FragColor=vec4(0.1, 0.1, 0.1, 1);
}
[/java]
I will try to translate it to JME next week. And thank you for spending time.
I did a matcap shader! It is in the shaderBlow’s mercurial repository.
repository: http://code.google.com/p/jme-glsl-shaders/
http://img585.imageshack.us/img585/5445/matcapzzz.jpg
Another screenshots:
http://img155.imageshack.us/img155/7138/matcapzzz2.jpg
http://dl.dropbox.com/u/26887202/123/ShaderBlow_matcap.jpg
If some one is interested in MatCap textures…
MatCap textures library: http://www.pixologic.com/zbrush/downloadcenter/library/
MatCap Generator: http://bensimonds.com/2010/07/30/matcap-generator/
Awesome
http://toeas.com/emoticon/files/2011/08/awesome-emoticons-4.jpg
It’s really nice. Good job ;).
Hi @mifth
Is MatCap shader working fine on oyur pc?
This is what I see when I run TestMatCap on my:
Very weird!!!
Console log info:
INFO: Child (BitmapFont) attached to this node (null)
12/10/2012 12:37:13 com.jme3.scene.plugins.ogre.MeshLoader load
ADVERTENCIA: Cannot locate TestModels/LightBlow/jme_lightblow.material for model TestModels/LightBlow/jme_lightblow.mesh.xml
12/10/2012 12:37:13 com.jme3.scene.plugins.ogre.MeshLoader applyMaterial
ADVERTENCIA: Cannot locate Material for model TestModels/LightBlow/jme_lightblow.mesh.xml
12/10/2012 12:37:13 com.jme3.scene.Node attachChild
INFO: Child (jme_lightblow-geom-1) attached to this node (jme_lightblow-ogremesh)
12/10/2012 12:37:13 com.jme3.material.MaterialDef
INFO: Loaded material definition: FakeParticleBlow
12/10/2012 12:37:13 com.jme3.util.TangentBinormalGenerator processTriangleData
ADVERTENCIA: Angle between tangents exceeds tolerance for vertex 0.
12/10/2012 12:37:13 com.jme3.util.TangentBinormalGenerator processTriangleData
ADVERTENCIA: Angle between tangents exceeds tolerance for vertex 6.
12/10/2012 12:37:13 com.jme3.util.TangentBinormalGenerator processTriangleData
ADVERTENCIA: Angle between tangents exceeds tolerance for vertex 12.
12/10/2012 12:37:13 com.jme3.util.TangentBinormalGenerator processTriangleData
ADVERTENCIA: Angle between tangents exceeds tolerance for vertex 13.
…
INFO: Child (Statistics View) attached to this node (Gui Node)
12/10/2012 12:37:14 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform g_WorldViewMatrix is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:14 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_NormalMapPower is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:14 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_Y is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:14 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_X is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:14 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_Z is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform g_WorldViewMatrix is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_Y is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_X is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_Z is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform g_WorldViewMatrix is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_NormalMapPower is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_Y is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_X is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_Nor_Inv_Z is not declared in shader [ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=ShaderBlow/Shaders/MatCap/MatCap.frag, defines, type=Fragment, language=GLSL100]].
12/10/2012 12:37:15 com.jme3.renderer.lwjgl.LwjglRenderer updateUniformLocation
INFO: Uniform m_VertexColor is not declared in shader [ShaderSource[name=Common/MatDefs/Misc/Unshaded.vert, defines, type=Vertex, language=GLSL100], ShaderSource[name=Common/MatDefs/Misc/Unshaded.frag, defines, type=Fragment, language=GLSL100]].
@H
Using a Mac?
Could’ve been a Mac problem with the shader, but I’ve just noticed that thread was over a year old so the recent changes must have broken the whole thing.
@H said:
Is MatCap shader working fine on oyur pc?
Hi man!!!
OMG!!! Something goes wrong...
I have this image:
http://i.imgur.com/C8jJ0.pngCan you update MatCap's matdef i committed and try again?
http://code.google.com/p/jmonkeyplatform-contributions/source/detail?r=513
@madjack said:
Could've been a Mac problem with the shader, but I've just noticed that thread was over a year old so the recent changes must have broken the whole thing.
Shaderblow was moved to jme contribution repo. I made a lot of refactoring after that. I rolled back to version before changes in order to check, but it always works that way on my pc
I just need confirmation if it is a problem with my pc or a general issue.
@H , also try to do this in java class:
[java]
public static void main(final String[] args) {
final TestMatCap app = new TestMatCap();
AppSettings aps = new AppSettings(true);
aps.setRenderer(AppSettings.LWJGL_OPENGL2);
app.setSettings(aps);
app.start();
}
[/java]
If i set “LWJGL_OPENGL3” i got nothing in the scene.
@mifth said:
@H , also try to do this in java class:
[java]
public static void main(final String[] args) {
final TestMatCap app = new TestMatCap();
AppSettings aps = new AppSettings(true);
aps.setRenderer(AppSettings.LWJGL_OPENGL2);
app.setSettings(aps);
app.start();
}
[/java]
If i set "LWJGL_OPENGL3" i got nothing in the scene.
I tryed that and I updated the project but issue remains. It is my pc then :cry: I will have to check
Thanks very much
@H said:
I tryed that and I updated the project but issue remains. It is my pc then :cry: I will have to check
Thanks very much
Try to update video driver.
@mifth said:
Try to update video driver.
I found the issue... yeah!!!. Issue was on MatCap.frag: varying vec3 diffuseColor
diffuseColor is not a varying. I mean it was not declare on MatCap.vert (I don't know how my GPU (ATI graphic card) create it or what value assign to it :?) and it was making a psychedelic mess on my GPU. I will post a video... the effect was very funny!
So, I removed varying keyword and that solve the issue.
Check http://code.google.com/p/jmonkeyplatform-contributions/source/detail?r=514
EDIT: video added
http://youtu.be/FyIznNFNcdE
@H said:
I found the issue... yeah!!!. Issue was on MatCap.frag: varying vec3 diffuseColor
diffuseColor is not a varying. I mean it was not declare on MatCap.vert (I don't know how my GPU (ATI graphic card) create it or what value assign to it :?) and it was making a psychedelic mess on my GPU. I will post a video... the effect was very funny!
So, I removed varying keyword and that solve the issue.
Check http://code.google.com/p/jmonkeyplatform-contributions/source/detail?r=514
EDIT: video added
http://youtu.be/FyIznNFNcdE
OMG!!! Man!!! Thank you a lot!!! I was my fault. You did it really cool! Thank you!
Can you also check "Glass" shader? Class:
http://code.google.com/p/jmonkeyplatform-contributions/source/browse/trunk/ShaderBlow/?r=514#ShaderBlow%2Ftest-src%2Fcom%2Fshaderblow%2Ftest%2Fglass
@mifth said:
Can you also check "Glass" shader?
I commited a fix and code cleanup yesterday. You already saw that I think.
@H said:
I commited a fix and code cleanup yesterday. You already saw that I think.
Yeah! You fixed a vital thing. I did a mistake with varying.
Good Job!!! You are doing really cool things!
I'll add Sky2 shader soon. This is a shader for stars making.