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POSpecular highlights of a translucent object - OpenGL
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  1. POSpecular highlights of a translucent object - OpenGL
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    copied!<p>I am working on my final project for my Computer Graphics course. It is all done in OpenGL. My project is to create a simulation of bubbles underwater. It is not supposed to be realistic, however, I have done all the requirements from my project proposal, so I am looking to do some more advanced stuff.</p> <p>Right now, my bubbles are not realistic. They are translucent, with a translucent white circle around each. The lighting is calculated using GL_LIGHT_MODEL_TWO_SIDE, glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA), and GL_POLYGON_SMOOTH. This gives an obvious bubble look.</p> <p>The one thing that I can not get, is specular highlights! They are there, but they are translucent white, not opaque white of real specular highlights on a shiny surface.</p> <p>If I set my alpha to all 1, then there are nice white specular highlights, but then my object is not translucent any more.</p> <p>I have played around with GL_SHININESS, with little success.</p> <p>Here is my code for lighting and materials:</p> <pre><code>glEnable(GL_LINE_SMOOTH); glEnable (GL_POLYGON_SMOOTH); glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST); glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glShadeModel(GL_SMOOTH); glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_LIGHT1); GLfloat mat_ambient[] = { 0.1, 0.1, 0.1, 0.15 }; GLfloat mat_diffuse[] = { 0.5, 0.95, 0.8, 0.2 }; GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 }; GLfloat mat_emission[] = { 0.0, 0.0, 0.0, 0.3 }; glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, mat_ambient); glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_diffuse); glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular); glMateriali(GL_FRONT_AND_BACK, GL_SHININESS, 32); glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, mat_emission); </code></pre> <p>Can anyone suggest a way to get bright, white specular highlights on a translucent object?</p>
 

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