Table of Contents

Shader.new

Available since version: Gideros 2015.06.30

Description:

Create new shader instance.
The ‘Shader.new()’ constructor takes five arguments:
- The path and name for the vertex shader without its extension. Gideros will search the assets for a file with the supplied name, automatically adding the extension relevant for the target platform: .glsl for OpenGL, .cso or .hlsl for DirectX.
- The path and name for the fragment shader without its extension. Same remark as above applies too.
- A set of numerical flags or 0 if none. See description below.
- An array of uniforms/constants descriptors
- An array of attributes descriptors

Syntax:

Shader.new(vertex shader, fragment shader, flags, uniform descriptor, attribute descriptor)

Parameters:

  • vertex shader: (string) The path and name for the vertex shader without its extension
  • fragment shader: (string) The path and name for the fragment shader without its extension
  • flags: (number) A set of numerical flags or 0 if none
  • uniform descriptor: (table) An array of uniforms/constants descriptors
  • attribute descriptor: (table) An array of attributes descriptors

Examples:

Shader example

--Shaders are in vShader.glsl and fShader.glsl files

local shader=Shader.new("vShader","fShader",0, {
 {name="vMatrix",type=Shader.CMATRIX,sys=Shader.SYS_WVP,vertex=true}, 
{name="fColor",type=Shader.CFLOAT4,sys=Shader.SYS_COLOR,vertex=false}, 
{name="fTexture",type=Shader.CTEXTURE,vertex=false}, 
{name="fTexelSize",type=Shader.CFLOAT4,vertex=false}, 
{name="fRad",type=Shader.CINT,vertex=false}, }, 
{ {name="vVertex",type=Shader.DFLOAT,mult=3,slot=0,offset=0}, 
{name="vColor",type=Shader.DUBYTE,mult=4,slot=1,offset=0}, 
{name="vTexCoord",type=Shader.DFLOAT,mult=2,slot=2,offset=0}, });

shader:setConstant("fRad",Shader.CINT,1,0) --Initial blur level 
shader:setConstant("fTexelSize",Shader.CFLOAT4,1,{1/texw,1/texh,0,0}) --Initial texel size

sprite:setShader(shader)