<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Thanks Ken. <div class=""><br class=""></div><div class="">I am using vtk 7.1.0<div class=""><br class=""></div><div class="">But the python wrapping of `vtkOpenGLPolyDataMapper` has no attribute `AddShaderReplacement`. Is there any way to do this with python wrapping?</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Quentan<br class=""><br class="Apple-interchange-newline"><br class=""><div><blockquote type="cite" class=""><div class="">On 20 Feb 2017, at 13:34, Ken Martin <<a href="mailto:ken.martin@kitware.com" class="">ken.martin@kitware.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">If using the new OpenGL rendering backend end see <div class=""><br class=""></div><div class=""><a href="http://www.vtk.org/Wiki/Shader_In_VTK" class="">http://www.vtk.org/Wiki/Shader_In_VTK</a><br class=""></div><div class=""><br class=""></div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Mon, Feb 20, 2017 at 8:17 AM, Quentan Qi <span dir="ltr" class=""><<a href="mailto:quentan@gmail.com" target="_blank" class="">quentan@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class=""><p style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class="">Hi,</p><p style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class="">I want to ask how to pass uniform and attribute from host to shader by vtk’s python wrapping.</p><p style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class="">I follow <a style="box-sizing:border-box;background-color:transparent;color:rgb(65,131,196);text-decoration:none" class="">this instruction</a> to implement <a style="box-sizing:border-box;background-color:transparent;color:rgb(65,131,196);text-decoration:none" class="">this result</a>, but don’t know how to pass uniform variables from host to fragment shader. </p><p style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class="">Could anybody tell me how to do this?</p><p style="box-sizing:border-box;margin:0px 0px 16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class="">Cheers,<br style="box-sizing:border-box" class="">Quentan</p><hr style="box-sizing:content-box;height:4px;margin:16px 0px;overflow:hidden;background-color:rgb(231,231,231);border:0px none;padding:0px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px" class=""><ul style="box-sizing:border-box;padding:0px 0px 0px 2em;margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class=""><li style="box-sizing:border-box" class="">Shader02.py</li></ul><pre style="box-sizing:border-box;overflow:auto;margin-top:0px;margin-bottom:16px;line-height:1.45;padding:16px;background-color:rgb(248,248,248);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;height:2266px" class=""><code class="m_6227054243253370675nix m_6227054243253370675(null) m_6227054243253370675hljs" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;padding:0.5em;margin:0px;border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;border:0px;display:block;overflow-x:auto;line-height:inherit;word-wrap:normal;height:auto"><span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">import</span> vtk
<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">import</span> time
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">timer</span> = [time.clock()]
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">resolution</span> = [<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">600</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">480</span>]
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">file</span> = open('Shader02.vert', 'r')
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">vert</span> = file.read()
file.close()
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">file</span> = open('Shader02.frag', 'r')
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">frag</span> = file.read()
file.close()
<span class="m_6227054243253370675hljs-comment" style="box-sizing:border-box;color:rgb(153,153,136);font-style:italic"># Plane. Is there better way to show ShaderToy's effect without use vtkPlaneSource?</span>
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">plane</span> = vtk.vtkPlaneSource()
plane.SetNormal([<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>])
plane.SetResolution(<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">100</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">100</span>)
plane.SetOrigin(-<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>, -<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0</span>)
plane.SetPoint1(<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>, -<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>)
plane.SetPoint2(-<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0</span>)
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box">mapper</span> = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(<wbr class="">plane.GetOutputPort())
<span class="m_6227054243253370675hljs-attr" style="box-sizing:border-box"><br class=""></span></code><code class="m_6227054243253370675nix m_6227054243253370675(null) m_6227054243253370675hljs" style="box-sizing:border-box;padding:0.5em;margin:0px;border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;border:0px;display:block;overflow-x:auto;line-height:inherit;word-wrap:normal;height:auto"><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">actor</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().<wbr class="">SetOpacity(</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">1</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">)
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># Handle the rendering and interaction</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">ren</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkRenderer()
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">renWin</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">iren</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkRenderWindowInteractor(<wbr class="">)
iren.SetRenderWindow(renWin)
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">resolutionUniform</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkUniformVariables()
resolutionUniform.SetUniformi(<wbr class="">'iResolution', </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">2</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, resolution)
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">timeUniform</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkUniformVariables()
timeUniform.SetUniformf('<wbr class="">iGlobalTime', </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">1</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, timer)
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># Now let's get down to shader-business...</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># First we make a ShaderProgram2 and set it up on a date with the RenderWindow</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">pgm</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkShaderProgram2()
pgm.SetContext(renWin)
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># For both the vertex and fragment shader, we need to make a Shader2</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># Also set them up with the RenderWindow, by asking the ShaderProgram2 for</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># an introduction</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">shaderv</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkShader2()
shaderv.SetType(vtk.VTK_<wbr class="">SHADER_TYPE_VERTEX)
shaderv.SetSourceCode(vert)
shaderv.SetContext(pgm.<wbr class="">GetContext())
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">shaderf</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = vtk.vtkShader2()
shaderf.SetType(vtk.VTK_<wbr class="">SHADER_TYPE_FRAGMENT)
shaderf.SetSourceCode(frag)
shaderf.SetContext(pgm.<wbr class="">GetContext())
shaderf.SetUniformVariables(<wbr class="">resolutionUniform) </font><span style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;font-style:italic" class=""># is this correct?</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># print shaderf.GetUniformVariables()</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
shaderf.SetUniformVariables(<wbr class="">timeUniform)
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># print shaderf.GetUniformVariables()</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># Now we add the shaders to the program</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
pgm.GetShaders().AddItem(<wbr class="">shaderv)
pgm.GetShaders().AddItem(<wbr class="">shaderf)
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># And tell the actor property that it should totally use this cool program</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-attr" style="color:rgb(51,51,51);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">openGLproperty</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class=""> = actor.GetProperty()
openGLproperty.SetPropProgram(<wbr class="">pgm)
openGLproperty.ShadingOn()
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># openGLproperty.<wbr class="">AddShaderVariable('<wbr class="">iGlobalTime', 1, timer) # is this correct?</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># openGLproperty.<wbr class="">AddShaderVariable('<wbr class="">iResolution', 2, resolution)</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
</font><span class="m_6227054243253370675hljs-comment" style="color:rgb(153,153,136);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box;font-style:italic"># Add the actor and set a nice bg color</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">
ren.AddActor(actor)
ren.SetBackground(</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0.3</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0.4</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">)
ren.SetBackground2(</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0.1</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0.2</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">)
ren.SetGradientBackground(</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">1</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">)
renWin.SetSize(resolution)
iren.Initialize()
ren.GetActiveCamera().<wbr class="">SetPosition(</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, -</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">1</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">)
ren.GetActiveCamera().<wbr class="">SetViewUp(</font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">0</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">, </font><span class="m_6227054243253370675hljs-number" style="color:rgb(0,128,128);font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;box-sizing:border-box">1</span><font color="#333333" face="Consolas, Liberation Mono, Menlo, Courier, monospace" size="3" class="">)
ren.ResetCamera()
renWin.Render()
iren.Start()
</font></code></pre><ul style="box-sizing:border-box;padding:0px 0px 0px 2em;margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class=""><li style="box-sizing:border-box" class="">Shader02.vert</li></ul><pre style="box-sizing:border-box;overflow:auto;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;margin-top:0px;margin-bottom:16px;line-height:1.45;padding:16px;background-color:rgb(248,248,248);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;color:rgb(51,51,51);height:106px" class=""><code class="m_6227054243253370675hljs m_6227054243253370675(null) m_6227054243253370675glsl" style="box-sizing:border-box;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;padding:0.5em;margin:0px;border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;border:0px;display:block;overflow-x:auto;line-height:inherit;word-wrap:normal;height:auto"><span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">void</span> propFuncVS(<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">void</span>) {
<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">gl_Position</span> = <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec4</span>((<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">gl_Vertex</span>.xy), <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0.0</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.0</span>);
}</code></pre><ul style="box-sizing:border-box;padding:0px 0px 0px 2em;margin-top:0px;margin-bottom:16px;color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:16px;background-color:rgb(255,255,255)" class=""><li style="box-sizing:border-box" class="">Shader02.frag</li></ul><pre style="box-sizing:border-box;overflow:auto;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:13.600000381469727px;margin-top:0px;line-height:1.45;padding:16px;background-color:rgb(248,248,248);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-wrap:normal;color:rgb(51,51,51);height:1386px;margin-bottom:0px!important" class=""><code class="m_6227054243253370675hljs m_6227054243253370675(null) m_6227054243253370675glsl" style="box-sizing:border-box;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;padding:0.5em;margin:0px;border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;border:0px;display:block;overflow-x:auto;line-height:inherit;word-wrap:normal;height:auto"><span class="m_6227054243253370675hljs-comment" style="box-sizing:border-box;color:rgb(153,153,136);font-style:italic">// ShaderToy: The Blob</span>
<span class="m_6227054243253370675hljs-comment" style="box-sizing:border-box;color:rgb(153,153,136);font-style:italic">// <a href="https://www.shadertoy.com/view/XsXGRS" target="_blank" class="">https://www.shadertoy.com/<wbr class="">view/XsXGRS</a></span>
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">uniform</span> <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> iGlobalTime; <span style="color:rgb(153,153,136);font-style:italic" class="">// not work. uniform or varying?</span>
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">uniform</span> <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span> iResolution;
<span class="m_6227054243253370675hljs-comment" style="box-sizing:border-box;color:rgb(153,153,136);font-style:italic">// float iGlobalTime = 1.0;</span>
<span class="m_6227054243253370675hljs-comment" style="box-sizing:border-box;color:rgb(153,153,136);font-style:italic">// vec2 iResolution = vec2(600, 480); // This works, but not from host</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#ifdef GL_ES</span>
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">precision</span> <span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">highp</span> <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span>;
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#endif</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#define AA 4.</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#define CI vec3(.3,.5,.6)</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#define CO vec3(.2)</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#define CM vec3(.0)</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#define CE vec3(.8,.7,.5)</span>
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> metaball(<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span> p, <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> r)
{
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">return</span> r / <span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">dot</span>(p, p);
}
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec3</span> samplef(<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">in</span> <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span> uv)
{
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#if 1</span>
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> t0 = <span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">sin</span>(iGlobalTime * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.9</span>) * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.46</span>;
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> t1 = <span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">sin</span>(iGlobalTime * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">2.4</span>) * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.49</span>;
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> t2 = <span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">cos</span>(iGlobalTime * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.4</span>) * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.57</span>;
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> r = metaball(uv + <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span>(t0, t2), <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.33</span>) *
metaball(uv - <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span>(t0, t1), <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.27</span>) *
metaball(uv + <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span>(t1, t2), <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.59</span>);
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#else</span>
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> r = <span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">length</span>(uv); <span style="color:rgb(153,153,136);font-style:italic" class="">// test for time-independent</span>
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#endif</span>
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec3</span> c = (r > <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.4</span> && r < <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.7</span>)
? (<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec3</span>(<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">step</span>(<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.1</span>, r*r*r)) * CE)
: (r < <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.9</span> ? (r < <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">.7</span> ? CO: CM) : CI);
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">return</span> c;
}
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">void</span> propFuncFS(<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">void</span>)
{
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span> uv = (<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">gl_FragCoord</span>.xy / iResolution.xy * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">2.</span> - <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.</span>)
* <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span>(iResolution.x / iResolution.y, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>) * <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.25</span>;
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec3</span> col = <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec3</span>(<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0</span>);
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#ifdef AA</span>
<span class="m_6227054243253370675hljs-comment" style="box-sizing:border-box;color:rgb(153,153,136);font-style:italic">// Antialiasing via supersampling</span>
<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> e = <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.</span> / <span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">min</span>(iResolution.y , iResolution.x);
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">for</span> (<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> i = -AA; i < AA; ++i) {
<span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">for</span> (<span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">float</span> j = -AA; j < AA; ++j) {
col += samplef(uv + <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec2</span>(i, j) * (e/AA)) / (<span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">4.</span>*AA*AA);
}
}
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#else</span>
col += <span class="m_6227054243253370675hljs-keyword" style="box-sizing:border-box;font-weight:bold">sample</span>(uv);
<span class="m_6227054243253370675hljs-meta" style="box-sizing:border-box;color:rgb(153,153,153);font-weight:bold">#endif /* AA */</span>
<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">gl_FragColor</span> = <span class="m_6227054243253370675hljs-type" style="box-sizing:border-box;color:rgb(68,85,136);font-weight:bold">vec4</span>(<span class="m_6227054243253370675hljs-built_in" style="box-sizing:border-box;color:rgb(0,134,179)">clamp</span>(col, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">0.</span>, <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1.</span>), <span class="m_6227054243253370675hljs-number" style="box-sizing:border-box;color:rgb(0,128,128)">1</span>);
}</code></pre><div class=""><br class=""></div></div><br class="">______________________________<wbr class="">_________________<br class="">
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