M3chDroid: Blender project

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  Richard Kain polycounter lvl 18

  Jun 2007

  Hmmm...I like the mech model you've created for this project. It is very simple, but the style is appealing. I also think you've done a good job with the shader/material applied to the mech. A variation on the toon shader, and it seems to work well.

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  mechdroid

  Jun 2007

  Wow! Thankx for your speed light feedback Kain!
  
  Actually when i started this projet Blender community did not have a GLSL python script with outline. So i worked with the most common two texture script we have, and with very simple texture styles to achieve this "cartoon look":
  
  import GameLogic as g
  objlist = g.getCurrentScene().getObjectList()
  g.setLogicTicRate(60.0)
  #

  ---

  ShaderObjects = [ objlist ]
  MaterialIndexList = [0,1]
  GlobalAmbient = [0.39,0.35,0.32,1]
  AmbF = 0.5
  #

  ---

  
  VertexShader = """
  uniform mat4 mvi;
  vec4 Tangent;
  
  varying vec4 vcol;
  
  varying vec3 lvec,vvec;
  
  vec3 TBN(in vec3 by)
  {
  vec3 tangent = (Tangent.xyz);
  vec3 binormal = cross(gl_Normal, Tangent.xyz)*Tangent.w;
  vec3 normal = gl_Normal;
  
  vec3 tvec;
  tvec.x = dot(tangent, by);
  tvec.y = dot(binormal, by);
  tvec.z = dot(normal, by);
  return tvec;
  }
  
  void main() {
  gl_Position = ftransform();
  
  // texcoord now (vec4())
  Tangent = gl_MultiTexCoord1;
  
  vec4 light0 = (mvi*gl_LightSource[0].position)-gl_Vertex;
  
  vec4 view = mvi[3]-gl_Vertex;
  
  lvec = TBN(light0.xyz);
  vvec = TBN(view.xyz);
  
  gl_TexCoord[0] = gl_MultiTexCoord0;
  
  vcol =gl_Color;
  }
  """
  
  FragmentShader = """
  varying vec4 vcol;
  varying vec3 lvec,vvec,hvec;
  
  
  uniform sampler2D color;
  uniform sampler2D bump;
  
  void main() {
  vec4 diffuse_color = vcol*gl_LightSource[0].diffuse;
  vec4 specular_color = gl_FrontMaterial.specular;
  vec4 colormap = texture2D(color, gl_TexCoord[0].st);
  
  vec3 lv = normalize(lvec);
  vec3 vv = normalize(vvec);
  vec3 nv = normalize(2.0*texture2D(bump, gl_TexCoord[0].st).xyz-1.0);
  
  float diff = max(dot(lv, nv), 0.0);
  float spec = pow(max(dot(reflect(-vv, nv), lv),0.0), gl_FrontMaterial.shininess);
  
  vec4 diff_pass = colormap*(diff*diffuse_color);
  vec4 spec_pass = spec*specular_color;
  gl_FragColor = vec4(0.1,0.1,0.1,1.0)+diff_pass+spec_pass;
  }
  """
  
  
  def MainLoop ():
  # for each object
  for obj in ShaderObjects:
  
  mesh_index = 0
  mesh = obj.getMesh(mesh_index)
  
  while mesh != None:
  
  for mat in mesh.materials:
  
  # regular TexFace materials do NOT have this function
  if not hasattr(mat, "getMaterialIndex"):
  return
  
  mat_index = mat.getMaterialIndex()
  
  # find an index
  found = 0
  for i in range(len(MaterialIndexList)):
  if mat_index == MaterialIndexList:
  found=1
  break
  if not found: continue
  
  shader = mat.getShader()
  if shader != None:
  if not shader.isValid():
  shader.setSource(VertexShader, FragmentShader,1)
  
  
  # shader.setAttrib(g.SHD_TANGENT)
  shader.setUniformDef('mvi', g.MODELVIEWMATRIX_INVERSE)
  shader.setSampler('color', 0)
  shader.setSampler('bump', 1)
  
  mesh_index += 1
  mesh = obj.getMesh(mesh_index)
  
  #

  ---

  MainLoop()
  #

  ---

  
  Nowadays, Piraniac have created a very cool script able to fake black outlines (i will try to integrate this into my project):
  
  http://blenderartists.org/forum/showthread.php?t=97601

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