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POrender transparent textures
 

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    <p>I have one texture that has some portions which are transparent transparent I want to apply over an object whose faces are some opaque material (or colour if it's simpler) but the final object gets transparent. I want the final object to be totally opaque.</p> <p>Here is my code:</p> <p>First I set the material:</p> <pre><code> glDisable(GL_COLOR_MATERIAL); glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT); glColor4f(0.00, 0.00, 0.00, 1.00); glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE); glColor4f(0.80, 0.80, 0.80, 1.00); glColorMaterial(GL_FRONT_AND_BACK, GL_SPECULAR); glColor4f(0.01, 0.01, 0.01, 1.00); glEnable(GL_COLOR_MATERIAL); </code></pre> <p>Then I setup the VBOs</p> <pre><code> glBindTexture(GL_TEXTURE_2D, object-&gt;texture); glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); glBindBuffer(GL_ARRAY_BUFFER, object-&gt;object); glVertexPointer(3, GL_FLOAT, sizeof(Vertex), ver_offset); glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), tex_offset); glNormalPointer(GL_FLOAT, sizeof(Vertex), nor_offset); </code></pre> <p>And finally I draw the object</p> <pre><code> glEnable(GL_BLEND); glDisable(GL_DEPTH_TEST); glDisable(GL_TEXTURE_2D); glBlendFunc(GL_ONE, GL_ZERO); glDrawArrays(GL_TRIANGLES, 0, object-&gt;num_faces); glEnable(GL_TEXTURE_2D); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glDrawArrays(GL_TRIANGLES, 0, object-&gt;num_faces); glDisableClientState(GL_VERTEX_ARRAY); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glDisable(GL_BLEND); glEnable(GL_DEPTH_TEST); </code></pre> <p>I tried passing different arguments to glBlendFunc() with no prevail. I've uploaded the source here: <a href="http://dpaste.com/83559/" rel="nofollow noreferrer">http://dpaste.com/83559/</a></p> <p><strong>UPDATE</strong> I <em>get</em> <a href="http://img174.yfrog.com/img174/1041/capturecrantitle1.png" rel="nofollow noreferrer">this</a>, but I <em>want</em> <a href="http://img210.imageshack.us/img210/5120/capturecranfereastrfrti.png" rel="nofollow noreferrer">this</a> (or without texture <a href="http://img41.imageshack.us/img41/5120/capturecranfereastrfrti.png" rel="nofollow noreferrer">this</a>).</p> <p>The 2nd and the 3rd picture are produces with <a href="http://devernay.free.fr/hacks/glm/" rel="nofollow noreferrer">glm</a>. I studied the sources, but since my knowledge of OpenGL is limited I didn't understand much.</p>
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      1. VTUpMod
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    1. COwhat are you trying to achieve? a transparent object with some solid pixels? or a solid object with some transparent textures showing the solid color beneath?
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      1. USPeter Parker
    2. COthe later: a solid object with some transparent textures showing the solid color beneath?
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    3. COthanks for the update ... and DEFINITELY sort out your Z-Buffering as i suggested.
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      1. USGoz
 

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