[Crystal-develop] Few Questions

Naman Gupta [mailto:]=20

1970-01-01 00:00:00 UTC

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1) None that I know of – shaders are data-parallel and accordingly you only get the information of the piece you’re processing

2) Filtering is disabled for heightmaps iirc (to prevent awkward interpolation) – you can do it manually, though (query the adjacent texels and interpolate manually using the properly converted height value)

3) Once you have the mesh you can set a material on it (either create a new one and set the shader, textures, etc. as desired or grab one you loaded or got elsewhere and simply set it on the mesh)

From: Naman Gupta [mailto:***@gmail.com]
Sent: Monday, May 12, 2014 22:12
To: crystal-***@lists.sourceforge.net
Subject: [Crystal-develop] Few Questions

Hi,

I encountered few problem would appreciate if someone could answer.

1). Is there a way to retrieve information about the adjacent vertex in vertex shader?

2). The water waves are created by translating heightmaps in waterdemo2, upon closing looking, you could see the waves aren't translating smoothly because color values are discrete. This is the shader code
" ...
vec2 Texcord = texCoord + waveInput.time*10.0 ;
position_object.y += texture2D(texHeight, Texcord/128).r * 2.0;
..."
Is there are way to like interpolate the values between two consecutive colors to make waves go smoother?

2). How do we add texture to the inner side of a box generated like this
"...
CS::Geometry::DensityTextureMapper mapper (0.3f);

CS::Geometry::TesselatedBox box (csVector3 (0, 0, 0), csVector3 (10, 10, 10));

box.SetLevel (3);

box.SetMapper (&mapper);

box.SetFlags (CS::Geometry::Primitives::CS_PRIMBOX_INSIDE);

// Now we make a factory and a mesh at once.

csRef<iMeshWrapper> walls = CS::Geometry::GeneralMeshBuilder::CreateFactoryAndMesh (

engine, room, "walls", "walls_factory", &box);
..."

I'm trying to make a skybox.

Also, Could someone get the search functionality working on the documentation given in the link "http://www.crystalspace3d.org/docs/online/manual/"?

~N

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<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style></style></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>1)<span style='font:7.0pt "Times New Roman"'>      </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>None that I know of – shaders are data-parallel and accordingly you only get the information of the piece you’re processing<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>2)<span style='font:7.0pt "Times New Roman"'>      </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Filtering is disabled for heightmaps iirc (to prevent awkward interpolation) – you can do it manually, though (query the adjacent texels and interpolate manually using the properly converted height value) <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><span style='mso-list:Ignore'>3)<span style='font:7.0pt "Times New Roman"'>      </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Once you have the mesh you can set a material on it (either create a new one and set the shader, textures, etc. as desired or grab one you loaded or got elsewhere and simply set it on the mesh)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> Naman Gupta [mailto:***@gmail.com] <br><b>Sent:</b> Monday, May 12, 2014 22:12<br><b>To:</b> crystal-***@lists.sourceforge.net<br><b>Subject:</b> [Crystal-develop] Few Questions<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi,<br><br>    I encountered few problem would appreciate if someone could answer.<br><br>1). Is there a way to retrieve information about the adjacent vertex in vertex shader?<br><br>2). The water waves are created by translating heightmaps in waterdemo2, upon closing looking, you could see the waves aren't translating smoothly because color values are discrete. This is the shader code<br>" ...<br>vec2 Texcord = texCoord + waveInput.time*10.0 ;<br>position_object.y += texture2D(texHeight, Texcord/128).r * 2.0;<br>..."<br>Is there are way to like interpolate the values between two consecutive colors to make waves go smoother?  <br><br>2). How do we add texture to the inner side of a box generated like this <br>"...<br>  CS::Geometry::DensityTextureMapper mapper (0.3f);<o:p></o:p></p><div><p class=MsoNormal>  CS::Geometry::TesselatedBox box (csVector3 (0, 0, 0), csVector3 (10, 10, 10));<o:p></o:p></p></div><div><p class=MsoNormal>  box.SetLevel (3);<o:p></o:p></p></div><div><p class=MsoNormal>  box.SetMapper (&mapper);<o:p></o:p></p></div><div><p class=MsoNormal>  box.SetFlags (CS::Geometry::Primitives::CS_PRIMBOX_INSIDE);<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>  // Now we make a factory and a mesh at once.<o:p></o:p></p></div><div><p class=MsoNormal>  csRef<iMeshWrapper> walls =   CS::Geometry::GeneralMeshBuilder::CreateFactoryAndMesh (<o:p></o:p></p></div><p class=MsoNormal>  engine, room, "walls", "walls_factory", &box);<br>..."<br><br>I'm trying to make a skybox. <br><br><br>Also, Could someone get the search functionality working on the documentation given in the link "<a href="http://www.crystalspace3d.org/docs/online/manual/">http://www.crystalspace3d.org/docs/online/manual/</a>"?<br><br>~N<o:p></o:p></p></div></div></body></html>
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