Re: [osg-users] Texture Mapping Meeting Point Shadow
That fixed it, thank you so much! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=63713#63713 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texture Mapping Meeting Point Shadow
Hi Erik,
That looks like a texture wrap issue. Try setting your texture wrap mode to
CLAMP_TO_EDGE:
pTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
pTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
Cheers,
Farshid
On Mon, May 11, 2015 at 12:39 PM, Erik Hensens wrote:
> Hello all!
>
> I'm having trouble with image texture mapping a geode. Specifically, where
> the top and the bottom of the image meet, there is a dark shadow effect
> that I want to avoid.
>
> I've created the simplest example of how I'm attempting the texture
> mapping and I've taken screenshots that show the unwanted shadow (please
> see the attached screenshots and the overlay image itself).
>
> Below is the code I'm using. As you can see, it's very simple: just four
> quadrangle faces that form four sides of an open-ended box. I've attempted
> to map the overlay image around the entire box so that the top and bottom
> meet at one of the four edges.
>
> Does anyone have any idea what I'm doing wrong or how I can modify my code
> to get rid of the shadow effect? Thanks a bunch in advance!
>
>
> Code:
> // Create the new geode node
> osg::ref_ptr < osg::Geode > pGeode = new osg::Geode;
>
> // Create the single new geometry
> osg::ref_ptr < osg::Geometry > pGeometry = new osg::Geometry;
>
> // The vertex array to define the geometry shape
> osg::ref_ptr < osg::Vec3Array > pVertices = new osg::Vec3Array;
>
> // Add face 1/4 quad vertices
> pVertices->push_back(osg::Vec3(0.0f, 0.0f, 0.0f));
> pVertices->push_back(osg::Vec3(10.0f, 0.0f, 0.0f));
> pVertices->push_back(osg::Vec3(10.0f, 5.0f, 5.0f));
> pVertices->push_back(osg::Vec3(0.0f, 5.0f, 5.0f));
>
> // Add face 2/4 quad vertices
> pVertices->push_back(osg::Vec3(0.0f, 5.0f, 5.0f));
> pVertices->push_back(osg::Vec3(10.0f, 5.0f, 5.0f));
> pVertices->push_back(osg::Vec3(10.0f, 0.0f, 10.0f));
> pVertices->push_back(osg::Vec3(0.0f, 0.0f, 10.0f));
>
> // Add face 3/4 quad vertices
> pVertices->push_back(osg::Vec3(0.0f, 0.0f, 10.0f));
> pVertices->push_back(osg::Vec3(10.0f, 0.0f, 10.0f));
> pVertices->push_back(osg::Vec3(10.0f, -5.0f, 5.0f));
> pVertices->push_back(osg::Vec3(0.0f, -5.0f, 5.0f));
>
> // Add face 4/4 quad vertices
> pVertices->push_back(osg::Vec3(0.0f, -5.0f, 5.0f));
> pVertices->push_back(osg::Vec3(10.0f, -5.0f, 5.0f));
> pVertices->push_back(osg::Vec3(10.0f, 0.0f, 0.0f));
> pVertices->push_back(osg::Vec3(0.0f, 0.0f, 0.0f));
>
> // Set the vertex array on the geometry
> pGeometry->setVertexArray(pVertices);
>
> // Create the geometry's color array
> osg::ref_ptr < osg::Vec4Array > pColors = new osg::Vec4Array;
> pColors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
>
> // Set the color array on the geometry
> pGeometry->setColorArray(pColors);
> pGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);
>
> // Set the quad draw array on the geometry
> osg::ref_ptr < osg::DrawArrays > pDrawArrays = new
> osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, static_cast < GLsizei
> >(pVertices->size()));
> pGeometry->addPrimitiveSet(pDrawArrays);
>
> // Load the overlay image
> osg::ref_ptr < osg::Image > pImage = osgDB::readImageFile("overlay.png");
>
> // Create the image texture
> osg::ref_ptr < osg::Texture2D > pTexture = new osg::Texture2D(pImage);
>
> // Create the texture coordinates array
> osg::ref_ptr < osg::Vec2Array > pTexCoords = new osg::Vec2Array;
>
> // Set face 1/4 quad texture overlay coordinates
> pTexCoords->push_back(osg::Vec2(0.0f, 0.0f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.0f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.25f));
> pTexCoords->push_back(osg::Vec2(0.0f, 0.25f));
>
> // Set face 2/4 quad texture overlay coordinates
> pTexCoords->push_back(osg::Vec2(0.0f, 0.25f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.25f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.50f));
> pTexCoords->push_back(osg::Vec2(0.0f, 0.50f));
>
> // Set 3/4 quad texture overlay coordinates
> pTexCoords->push_back(osg::Vec2(0.0f, 0.50f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.50f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.75f));
> pTexCoords->push_back(osg::Vec2(0.0f, 0.75f));
>
> // Set 4/4 quad texture overlay coordinates
> pTexCoords->push_back(osg::Vec2(0.0f, 0.75f));
> pTexCoords->push_back(osg::Vec2(1.0f, 0.75f));
> pTexCoords->push_back(osg::Vec2(1.0f, 1.0f));
> pTexCoords->push_back(osg::Vec2(0.0f, 1.0f));
>
> // Set the geometry's texture coordinates array
> pGeometry->setTexCoordArray(0, pTexCoords);
>
> // Get the geometry's stateset
> osg::ref_ptr < osg::StateSet > pStateSet =
> pGeometry->getOrCreateStateSet();
>
> // Set the texture on the stateset
> pStateSet->setTextureAttributeAndModes(0, pTexture,
> osg::StateAttribute::ON);
>
> // Set the geometry's stateset
> pGeometry->setStateSet(pStateSet);
>
> // Add the single drawable to the geode node
> pGeode->addDrawable(pGeometry);
>
> // Add this new geode to the scene
> pTopGroupNode->addChild(pGeode);
>
>
>
> Cheers,
> Erik
>
> --
> Read this topic online
[osg-users] Texture Mapping Meeting Point Shadow
Hello all!
I'm having trouble with image texture mapping a geode. Specifically, where the
top and the bottom of the image meet, there is a dark shadow effect that I want
to avoid.
I've created the simplest example of how I'm attempting the texture mapping and
I've taken screenshots that show the unwanted shadow (please see the attached
screenshots and the overlay image itself).
Below is the code I'm using. As you can see, it's very simple: just four
quadrangle faces that form four sides of an open-ended box. I've attempted to
map the overlay image around the entire box so that the top and bottom meet at
one of the four edges.
Does anyone have any idea what I'm doing wrong or how I can modify my code to
get rid of the shadow effect? Thanks a bunch in advance!
Code:
// Create the new geode node
osg::ref_ptr < osg::Geode > pGeode = new osg::Geode;
// Create the single new geometry
osg::ref_ptr < osg::Geometry > pGeometry = new osg::Geometry;
// The vertex array to define the geometry shape
osg::ref_ptr < osg::Vec3Array > pVertices = new osg::Vec3Array;
// Add face 1/4 quad vertices
pVertices->push_back(osg::Vec3(0.0f, 0.0f, 0.0f));
pVertices->push_back(osg::Vec3(10.0f, 0.0f, 0.0f));
pVertices->push_back(osg::Vec3(10.0f, 5.0f, 5.0f));
pVertices->push_back(osg::Vec3(0.0f, 5.0f, 5.0f));
// Add face 2/4 quad vertices
pVertices->push_back(osg::Vec3(0.0f, 5.0f, 5.0f));
pVertices->push_back(osg::Vec3(10.0f, 5.0f, 5.0f));
pVertices->push_back(osg::Vec3(10.0f, 0.0f, 10.0f));
pVertices->push_back(osg::Vec3(0.0f, 0.0f, 10.0f));
// Add face 3/4 quad vertices
pVertices->push_back(osg::Vec3(0.0f, 0.0f, 10.0f));
pVertices->push_back(osg::Vec3(10.0f, 0.0f, 10.0f));
pVertices->push_back(osg::Vec3(10.0f, -5.0f, 5.0f));
pVertices->push_back(osg::Vec3(0.0f, -5.0f, 5.0f));
// Add face 4/4 quad vertices
pVertices->push_back(osg::Vec3(0.0f, -5.0f, 5.0f));
pVertices->push_back(osg::Vec3(10.0f, -5.0f, 5.0f));
pVertices->push_back(osg::Vec3(10.0f, 0.0f, 0.0f));
pVertices->push_back(osg::Vec3(0.0f, 0.0f, 0.0f));
// Set the vertex array on the geometry
pGeometry->setVertexArray(pVertices);
// Create the geometry's color array
osg::ref_ptr < osg::Vec4Array > pColors = new osg::Vec4Array;
pColors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
// Set the color array on the geometry
pGeometry->setColorArray(pColors);
pGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);
// Set the quad draw array on the geometry
osg::ref_ptr < osg::DrawArrays > pDrawArrays = new
osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, static_cast < GLsizei
>(pVertices->size()));
pGeometry->addPrimitiveSet(pDrawArrays);
// Load the overlay image
osg::ref_ptr < osg::Image > pImage = osgDB::readImageFile("overlay.png");
// Create the image texture
osg::ref_ptr < osg::Texture2D > pTexture = new osg::Texture2D(pImage);
// Create the texture coordinates array
osg::ref_ptr < osg::Vec2Array > pTexCoords = new osg::Vec2Array;
// Set face 1/4 quad texture overlay coordinates
pTexCoords->push_back(osg::Vec2(0.0f, 0.0f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.0f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.25f));
pTexCoords->push_back(osg::Vec2(0.0f, 0.25f));
// Set face 2/4 quad texture overlay coordinates
pTexCoords->push_back(osg::Vec2(0.0f, 0.25f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.25f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.50f));
pTexCoords->push_back(osg::Vec2(0.0f, 0.50f));
// Set 3/4 quad texture overlay coordinates
pTexCoords->push_back(osg::Vec2(0.0f, 0.50f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.50f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.75f));
pTexCoords->push_back(osg::Vec2(0.0f, 0.75f));
// Set 4/4 quad texture overlay coordinates
pTexCoords->push_back(osg::Vec2(0.0f, 0.75f));
pTexCoords->push_back(osg::Vec2(1.0f, 0.75f));
pTexCoords->push_back(osg::Vec2(1.0f, 1.0f));
pTexCoords->push_back(osg::Vec2(0.0f, 1.0f));
// Set the geometry's texture coordinates array
pGeometry->setTexCoordArray(0, pTexCoords);
// Get the geometry's stateset
osg::ref_ptr < osg::StateSet > pStateSet = pGeometry->getOrCreateStateSet();
// Set the texture on the stateset
pStateSet->setTextureAttributeAndModes(0, pTexture, osg::StateAttribute::ON);
// Set the geometry's stateset
pGeometry->setStateSet(pStateSet);
// Add the single drawable to the geode node
pGeode->addDrawable(pGeometry);
// Add this new geode to the scene
pTopGroupNode->addChild(pGeode);
Cheers,
Erik
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=63711#63711
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