lua and GetMaterialShader

[shadmar]

How to do this in the editor, I only get a crash when calling GetMaterialShader ?

 

function object:Init()
       object:SetKey("material", "rock1.mat")
       material=self:GetKey("material", "rock1.mat")
  	 shader=GetMaterialShader(material)   --    =====> Crashes EXCESS VIOLATION
  	 SetShaderFloat(shader,"wavescale",2)
end

[flachdrache]

Here is my "openwater_low" lua w.i.p. script - you most likely want to use SetShaderVec4 in le2.5+, however.

It lets the user choose a model to draw the effect on ... not sure how instance safe it is though ...

 

require("scripts/class")
local class=CreateClass(...)
function class:InitDialog(grid)
self.super:InitDialog(grid)
group1 = grid:AddGroup("Model")
group1:AddProperty("usemodel", PROPERTY_FILE, "GMF Files (*.gmf):gmf", "Model File", "Model Files")
group1:AddProperty("waterdepth", PROPERTY_FLOAT, "2|0.0,20","Water depth")
group1:AddProperty("depthcolor",PROPERTY_COLOR,"176,176,227,89","Water Depth color")
group1:AddProperty("fogcolor",PROPERTY_COLOR,"99,99,130,32","Water Fog color")
group1:AddProperty("fogrange",PROPERTY_VEC2,"","Water Fog range")
group1:AddProperty("ambientintensity", PROPERTY_FLOAT, "2|0.0,4","Intensity")
group1:Expand(1)
end
function class:CreateObject(model)
local object = self.super:CreateObject(model)
object.model = model
 object.waterdepth = 6.0
object.fogcolor   = Vec4(0.39, 0.39, 0.51, .125)
 object.fogrange   = Vec2(0.0, 400.0)
object.depthcolor = Vec4(0.69, 0.69, 0.89, .35)
 object.ambientintensity = 1.0
 --Use the invisible material so the model is not visible, but can still be picked
object.model:Paint(LoadMaterial("abstract::invisible.mat"), 0)
function object:SetKey(key,value)
 if key=="usemodel" then
  if fw~=nil then
SetWorld(fw.transparency.world)
	-- does leak into other instances (one shader instance)
	--
	if self.useModel == nil then
	  self.useModel = LoadMesh("abstract::"..value )  
	end
if self.useModel ~= nil then
 self.useModel:SetPosition(object.model:GetPosition(0))
 self.useModel:SetRotation(object.model:GetRotation(0))
 self.useModel:SetScale(object.model:GetScale(0))
end
SetWorld(fw.main.world)
  end
 elseif key=="fogcolor" then
  color=string.Explode(value,",")
  r=tonumber(color[1])
  g=tonumber(color[2])
  b=tonumber(color[3])
  a=tonumber(color[4])
  if r==nil then r=255 end
  if g==nil then g=255 end
  if b==nil then b=255 end
  if a==nil then a=255 end
  self.fogcolor = Vec4(r/255.0,g/255.0,b/255.0,a/255.0)
 elseif key=="fogrange" then
  self.fogrange=StringToVec2(value)
 elseif key=="depthcolor" then
  color=string.Explode(value,",")
  r=tonumber(color[1])
  g=tonumber(color[2])
  b=tonumber(color[3])
  a=tonumber(color[4])
  if r==nil then r=255 end
  if g==nil then g=255 end
  if b==nil then b=255 end
  if a==nil then a=255 end
  self.depthcolor = Vec4(r/255.0,g/255.0,b/255.0,a/255.0)
elseif key=="ambientintensity" then
  self.ambientintensity = tonumber(value)
elseif key=="waterdepth" then
  self.waterdepth = tonumber(value)
 else
  return self.super:SetKey(key,value)
 end
 return 1
end
function object:GetKey(key,value)
 if key=='fogcolor' then
  return (self.fogcolor.x*255.0)..','..(self.fogcolor.y*255.0)..','..(self.fogcolor.z*255.0)..','..(self.fogcolor.w*255.0)
 elseif key=="fogrange" then
  return self.fogrange.x..","..self.fogrange.y
 elseif key=='depthcolor' then
  return (self.depthcolor.x*255.0)..','..(self.depthcolor.y*255.0)..','..(self.depthcolor.z*255.0)..','..(self.depthcolor.w*255.0)
 elseif key=='ambientintensity' then
  return self.ambientintensity
 elseif key=='waterdepth' then
  return self.waterdepth
 elseif key=='usemodel' then
  return self.useModel
 else
  return self.super:GetKey(key,value)
 end
 return value
end
function object:Refresh()
 if fw~=nil then
  SetWorld(fw.transparency.world)
  local mat=LoadMaterial("abstract::effect_oceanplane_low.mat")
  local shader=GetMaterialShader(mat)
  SetShaderFloat(shader,"waterdepth", self.waterdepth)
  SetShaderFloat(shader, "fogcolorr",self.fogcolor.x)
  SetShaderFloat(shader, "fogcolorg",self.fogcolor.y)
  SetShaderFloat(shader, "fogcolorb",self.fogcolor.z)
  SetShaderFloat(shader, "fogcolora",self.fogcolor.w)
  SetShaderFloat(shader, "fograngex",self.fogrange.x)
  SetShaderFloat(shader, "fograngey",self.fogrange.y)
  SetShaderFloat(shader, "depthcolorr",self.depthcolor.x)
  SetShaderFloat(shader, "depthcolorg",self.depthcolor.y)
  SetShaderFloat(shader, "depthcolorb",self.depthcolor.z)
  SetShaderFloat(shader, "depthcolora",self.depthcolor.w)
  SetShaderFloat(shader, "lightambient",self.ambientintensity)
  --Use the invisible material and hide the model
  self.model:Paint(LoadMaterial("abstract::invisible.mat"), 0)
  self.model:Hide()
  if self.useModel ~= nil then
self.useModel:Paint(mat)
self.useModel:UpdateLocalAABB()
self.useModel:UpdateAABB()
self.useModel:SetColor(self.model.color)
  end
  --Switch back to the main world
  SetWorld(fw.main.world)
 end
end
function object:UpdateMatrix()
 if fw~=nil then
  if object.useModel ~= nil then
self.useModel:SetPosition(object.model:GetPosition(0))
self.useModel:SetRotation(object.model:GetRotation(0))
self.useModel:SetScale(object.model:GetScale(0))
  end
 end
end
function object:UnlockKeys()
 self.super:UnlockKeys()
 self:Refresh()
end
function object:Free(model)
 local model,entity
 for model,entity in pairs(self.class.instances) do
  if entity~=self then
entity:Refresh()
break
  end
 end
 if self.useModel ~= nil then
  self.useModel:Free()
  self.useModel=nil
 end
 --self.super:Free()
 --Notify("Inside free")
end

end

 

PS:

i think it would be a good idea to have "effect_ambient" and "effect_sundirection" as a global with the dynamic "night&day" emitting these shader values but couldnt take a look into it further.

 

hth

[Daimour]

      material=self:GetKey("material", "rock1.mat")
      shader=GetMaterialShader(material)   --	=====> Crashes EXCESS VIOLATION

 

"material" - is not a material but material name (path).

 

Try this:

      path=self:GetKey("material")
      material = LoadMaterial(path)
      shader=GetMaterialShader(material)

 

And don't forget to use "abstract::" for paths. It will be more secure.

[shadmar]

Thanks guys I got it working, cool, I can now control my shaders live instead of reloading all the time:)

+5

[Gandi]

Did you also figure out, how to add custom textures to the waterplane?

[shadmar]

You mean the existng one? You have to add a texture slot in the mat file and then blend it in the shader using GLSL. But I haven't tried a diffuse one, just an extra normalmap like this :

 

normal += texture2D(texture7,modelvertex.xz*scale).xyz * 2.0 - 1.0; 

 

(on both refraction and reflection normals)