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Problem with TexCoords Generated on Android

http://www.emix8.org/forum/viewtopic.php?t=1634

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Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 5:25 pm
by Ats
While doing my daily tests with the 64-bit stuff, I just realized that the texture positions are completely off on Android when the TexCoords is set to Generated, both in 32-bit and 64-bit. Didn't we already fix that? Or maybe I'm confusing it with something else, I don't know.

Anyway, here's what it looks in preview and PC mode:
Screenshot 2024-10-02 192159.png
Screenshot 2024-10-02 192159.png (331.85 KiB) Viewed 2914 times
  • First row has the TexCoords Generated
  • Second row has the TexCoords ModelDefined
  • Then from left to right, the TextureWrapMode is Mirror, Tile and Clamp
And here's the same thing on Android:
Screenshot_20241002-192257.png
Screenshot_20241002-192257.png (381.18 KiB) Viewed 2914 times
(to test Android 64, I used the hacked lib with threads completely deactivated)

Here's the example:

Code: Select all

<?xml version="1.0" encoding="iso-8859-1" ?>
<ZApplication Name="App" Caption="ZGameEditor application" FileVersion="2" AndroidPackageName="com.mydomain.onrender">
  <OnRender>
    <Repeat Name="repeat" Count="6">
      <OnIteration>
        <ZExpression>
          <Expression>
<![CDATA[int i = repeat.Iteration;
transform.Translate.X = -2.5+(i % 3)*2.5;
transform.Translate.Y = 1.5-(i / 3)*3;

switch(i) {
case 0: @UseMaterial(MAterial:MaterialGeneratedMirror); break;
case 1: @UseMaterial(MAterial:MaterialGeneratedTile); break;
case 2: @UseMaterial(MAterial:MaterialGeneratedClamp); break;
case 3: @UseMaterial(MAterial:MaterialModelDefinedMirror); break;
case 4: @UseMaterial(MAterial:MaterialModelDefinedTile); break;
case 5: @UseMaterial(MAterial:MaterialModelDefinedClamp); break;
}]]>
          </Expression>
        </ZExpression>
        <RenderTransformGroup Name="transform" Translate="2.5 -1.5 0">
          <Children>
            <RenderTransform Rotate="0.1 0.1 0"/>
            <RenderMesh Mesh="CubeMesh"/>
          </Children>
        </RenderTransformGroup>
      </OnIteration>
    </Repeat>
  </OnRender>
  <Content>
    <Mesh Name="CubeMesh">
      <Producers>
        <MeshBox/>
      </Producers>
    </Mesh>
    <Bitmap Name="Bitmap1">
      <Producers>
        <BitmapCells RandomSeed="63"/>
      </Producers>
    </Bitmap>
    <Material Name="MaterialGeneratedMirror">
      <Textures>
        <MaterialTexture Texture="Bitmap1"/>
      </Textures>
    </Material>
    <Material Name="MaterialGeneratedTile">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialGeneratedClamp">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="2"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedMirror">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TexCoords="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedTile">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="1" TexCoords="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedClamp">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="2" TexCoords="1"/>
      </Textures>
    </Material>
  </Content>
</ZApplication>

Re: Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 5:46 pm
by Kjell
Hi Ats,

Generated texture coordinates aren't available on OpenGL ES. You can find the corresponding source code here.

That being said, this is what it looks like on my PC ( which looks correct to me ) .. not sure what's going on in your PC screenshot :(

Image

K

Re: Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 6:00 pm
by Ats
Oh, right. Thanks.

About the screenshot, I left some TexCoords coordinate numbers in my example that I edited afterwards. But that doesn't explain the bottom right cube... :?
(ModelDefined + Clamp)

Re: Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 6:09 pm
by Kjell
Hmm,

Can you take a screenshot of this on PC? Bit easier to "read" than the cells bitmap :wink:

Code: Select all

<?xml version="1.0" encoding="iso-8859-1" ?>
<ZApplication Name="App" Caption="ZGameEditor application" FileVersion="2" AndroidPackageName="com.mydomain.onrender">
  <OnRender>
    <Repeat Name="repeat" Count="6">
      <OnIteration>
        <ZExpression>
          <Expression>
<![CDATA[int i = repeat.Iteration;
transform.Translate.X = -2.5+(i % 3)*2.5;
transform.Translate.Y = 1.5-(i / 3)*3;

switch(i) {
case 0: @UseMaterial(MAterial:MaterialGeneratedMirror); break;
case 1: @UseMaterial(MAterial:MaterialGeneratedTile); break;
case 2: @UseMaterial(MAterial:MaterialGeneratedClamp); break;
case 3: @UseMaterial(MAterial:MaterialModelDefinedMirror); break;
case 4: @UseMaterial(MAterial:MaterialModelDefinedTile); break;
case 5: @UseMaterial(MAterial:MaterialModelDefinedClamp); break;
}]]>
          </Expression>
        </ZExpression>
        <RenderTransformGroup Name="transform" Translate="2.5 -1.5 0">
          <Children>
            <RenderTransform Rotate="0.1 0.1 0"/>
            <RenderMesh Mesh="CubeMesh"/>
          </Children>
        </RenderTransformGroup>
      </OnIteration>
    </Repeat>
  </OnRender>
  <Content>
    <Mesh Name="CubeMesh">
      <Producers>
        <MeshBox/>
      </Producers>
    </Mesh>
    <Bitmap Name="Bitmap1" Width="32" Height="32" Filter="1">
      <Producers>
        <BitmapExpression>
          <Expression>
<![CDATA[int u = X*32, v = Y*32;

if(u == 0 || u == 31 || v == 0 || v == 31)
{
  Pixel = 1;
}
else
{
  Pixel.R = X;
  Pixel.G = Y;
  Pixel.B = 1-X;
}]]>
          </Expression>
        </BitmapExpression>
      </Producers>
    </Bitmap>
    <Material Name="MaterialGeneratedMirror">
      <Textures>
        <MaterialTexture Texture="Bitmap1"/>
      </Textures>
    </Material>
    <Material Name="MaterialGeneratedTile">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialGeneratedClamp">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="2"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedMirror">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TexCoords="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedTile">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="1" TexCoords="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedClamp">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="2" TexCoords="1"/>
      </Textures>
    </Material>
  </Content>
</ZApplication>
Should look like this ..

Image

K

Re: Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 8:59 pm
by Ats
I just verified, on my screenshot, the problem really was coming from the MaterialTexture.TextureX that was far from 0. I have the same screenshot as you...

But not with your example :?
I copied and paste your code to get this on PC:
Screenshot 2024-10-02 225701.png
Screenshot 2024-10-02 225701.png (73.29 KiB) Viewed 2879 times

Re: Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 9:20 pm
by Kjell
Oops,

My mistake .. should have used round() to prevent the possibility of rounding errors. Try this instead :wink:

Code: Select all

<?xml version="1.0" encoding="iso-8859-1" ?>
<ZApplication Name="App" Caption="ZGameEditor application" FileVersion="2" AndroidPackageName="com.mydomain.onrender">
  <OnRender>
    <Repeat Name="repeat" Count="6">
      <OnIteration>
        <ZExpression>
          <Expression>
<![CDATA[int i = repeat.Iteration;
transform.Translate.X = -2.5+(i % 3)*2.5;
transform.Translate.Y = 1.5-(i / 3)*3;

switch(i) {
case 0: @UseMaterial(MAterial:MaterialGeneratedMirror); break;
case 1: @UseMaterial(MAterial:MaterialGeneratedTile); break;
case 2: @UseMaterial(MAterial:MaterialGeneratedClamp); break;
case 3: @UseMaterial(MAterial:MaterialModelDefinedMirror); break;
case 4: @UseMaterial(MAterial:MaterialModelDefinedTile); break;
case 5: @UseMaterial(MAterial:MaterialModelDefinedClamp); break;
}]]>
          </Expression>
        </ZExpression>
        <RenderTransformGroup Name="transform" Translate="2.5 -1.5 0">
          <Children>
            <RenderTransform Rotate="0.1 0.1 0"/>
            <RenderMesh Mesh="CubeMesh"/>
          </Children>
        </RenderTransformGroup>
      </OnIteration>
    </Repeat>
  </OnRender>
  <Content>
    <Mesh Name="CubeMesh">
      <Producers>
        <MeshBox/>
      </Producers>
    </Mesh>
    <Bitmap Name="Bitmap1" Width="32" Height="32" Filter="1">
      <Producers>
        <BitmapExpression>
          <Expression>
<![CDATA[int u = round(X*31), v = round(Y*31);

if(u == 0 || u == 31 || v == 0 || v == 31)
{
  Pixel = 1;
}
else
{
  Pixel.R = X;
  Pixel.G = Y;
  Pixel.B = 1-X;
}]]>
          </Expression>
        </BitmapExpression>
      </Producers>
    </Bitmap>
    <Material Name="MaterialGeneratedMirror">
      <Textures>
        <MaterialTexture Texture="Bitmap1"/>
      </Textures>
    </Material>
    <Material Name="MaterialGeneratedTile">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialGeneratedClamp">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="2"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedMirror">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TexCoords="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedTile">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="1" TexCoords="1"/>
      </Textures>
    </Material>
    <Material Name="MaterialModelDefinedClamp">
      <Textures>
        <MaterialTexture Texture="Bitmap1" TextureWrapMode="2" TexCoords="1"/>
      </Textures>
    </Material>
  </Content>
</ZApplication>
K

Re: Problem with TexCoords Generated on Android

Posted: Wed Oct 02, 2024 9:29 pm
by Ats
Perfection :wink:
All times are UTC
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