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POHow to make the lighting in OpenGL more visually pleasant?
 

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  1. POHow to make the lighting in OpenGL more visually pleasant?
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    <p>I need a rendering platform to show the result of my mesh processing algorithm, it's quite basic and easy, I've had it done, except that the default lighting from OpenGL is a little weird.</p> <p>My rendering result is like:</p> <p><img src="https://i.stack.imgur.com/7iY7d.png" alt="stanford bunny"></p> <p>And the lighting parameter in OpenGL is like:</p> <pre><code> // Lights properties float ambientProperties[] = {0.4f, 0.4f, 0.4f, 1.0f}; float diffuseProperties[] = {0.8f, 0.8f, 0.8f, 1.0f}; float specularProperties[] = {1.0f, 1.0f, 1.0f, 1.0f}; float lightPosition[] = {0.2f, -0.3f, -0.3f, 0.0f}; glLightfv(GL_LIGHT0, GL_AMBIENT, ambientProperties); glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseProperties); glLightfv(GL_LIGHT0, GL_SPECULAR, specularProperties); glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, 1.0); glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); // Material Properties float MatAmbient[] = {0.3f, 0.3f, 0.3f, 1.0f}; float MatDiffuse[] = {0.7f, 0.7f, 0.7f, 1.0f}; float MatSpecular[] = {0.8f, 0.8f, 0.8, 1.0f}; float MatShininess[] = { 64 }; float MatEmission[] = {0.0f, 0.0f, 0.0f, 1.0f}; glMaterialfv(GL_FRONT, GL_AMBIENT, MatAmbient); glMaterialfv(GL_FRONT, GL_DIFFUSE, MatDiffuse); glMaterialfv(GL_FRONT, GL_SPECULAR, MatSpecular); glMaterialfv(GL_FRONT, GL_SHININESS, MatShininess); glMaterialfv(GL_FRONT, GL_EMISSION, MatEmission); </code></pre> <p>What I want is something like this:</p> <p><a href="http://iparla.inria.fr/publications/2007/BS07b/sketch_teaser.jpg" rel="nofollow noreferrer">hand http://iparla.inria.fr/publications/2007/BS07b/sketch_teaser.jpg</a></p> <p>I've changed the full resolution version of mine rendering results to vertex normal and added a simplified version, to make the comparison more convincing. We can see that the latter ones are apparently more vividly lighted, ignoring the color. </p> <p>Can the default OpenGL lighting be parameter-tuned like the results that I want?? Or how can I retrieve codes for some high-quality GLSL shaders for lighting?? I'm only new to graphics rendering, and I think such a lighting routines is not rare.</p>
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    1. PTQuestion
    1. USwaytofall
    1. USwaytofall
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    1. COThat's not the result of lighting. I'm seeing more polygons in the right side than the left. OpenGL cannot make up polygons for you.
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      1. POHow to make the lighting in OpenGL more visually pleasant?
      1. USNicol Bolas
    2. COThat is what I thought. And I'm saying that the result you want is not *just* from lighting; it comes from adding *more polygons) to the surface. You can't turn on a magical "do better lighting" switch and expect to have *more polygons* added to the surface.
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      1. POHow to make the lighting in OpenGL more visually pleasant?
      1. USNicol Bolas
    3. COhowever, apparently, mine rendering results are different from the later one, even in the same resolution I guess, though I didn't know the primitive density of the lower model
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      1. POHow to make the lighting in OpenGL more visually pleasant?
      1. USwaytofall
 

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