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POOpenGL blend problem
 

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  1. POOpenGL blend problem
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    <p>I want to draw aquarium (container) standing on table. Walls of aquarium need to be blended.</p> <p>But, if I draw table first and then aquarium I get:<br> - looking from the up of the table: ok<br> - looking from the bottom of the table: wrong, I still see aquarium </p> <p>If I draw aquariun first and then table I get:<br> - looking from the up of the table: wrong, aquarium walls have no effect on the table (they affect the backgrounf, though)<br> - looking from the bottom of the table: wrong, I still see aquarium </p> <p>There is picture that explains it:</p> <p><a href="http://img213.imageshack.us/img213/6609/pictureem.jpg" rel="nofollow noreferrer">http://img213.imageshack.us/img213/6609/pictureem.jpg</a></p> <p>Code: main.cpp</p> <pre><code>int DrawGLScene(GLvoid) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA); Cam.SetPrespective(); //---------------- GLfloat LightPosition0[]= { 0.0, 0.0, 0.2, 1.0f }; GLfloat LightAmbient0[]= { 0, 0, 0, 1.0f }; GLfloat LightDiffuse0[]= { 1.0f, 1.0f, 1.0f, 1.0f }; GLfloat LightSpecular0[]= { 1.0f, 1.0f, 1.0f, 1.0f }; glLightfv(GL_LIGHT0, GL_AMBIENT, LightAmbient0); // Setup The Ambient Light glLightfv(GL_LIGHT0, GL_POSITION,LightPosition0); // Position The Light glLightfv(GL_LIGHT0, GL_DIFFUSE, LightDiffuse0); // Setup The Diffuse Light glLightfv(GL_LIGHT0, GL_SPECULAR, LightSpecular0); // Setup The Diffuse Light glEnable(GL_LIGHT0); glEnable(GL_COLOR_MATERIAL); glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE); //---------------- glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); // Setup The Ambient Light glLightfv(GL_LIGHT2, GL_POSITION,LightPosition); // Position The Light glLightfv(GL_LIGHT2, GL_DIFFUSE, LightDiffuse); // Setup The Diffuse Light drawContainer(); //container drawn first in this example //.. draw other things drawTable(); drawGround(); /* //.. draw other things drawTable(); drawGround(); drawContainer(); //container drawn last in this example */ CheckKeys(); if(mouse) { CheckMouse(); } return TRUE; } void drawTable() { glColor3f(1.0f, 0.5f, 1.0f); GLfloat cx = MIN_X+(MAX_X-MIN_X)/2.0f; GLfloat cy = MIN_Y-0.1f; GLfloat cz = MIN_Z+(MAX_Z-MIN_Z)/2.0f; GLfloat cr = sqrt((MAX_X-MIN_X)*(MAX_X-MIN_X)+(MAX_Z-MIN_Z)*(MAX_Z-MIN_Z))*0.85f; int th = 5.0f; //centerPieceThickness drawCylinder(cx,cy,cz,th,cr); glColor3f(0.7f, 0.5f, 0.5f); drawCylinder(MAX_X+cr*0.155f, cy-th, MAX_Z+cr*0.155f, 25*th, cr*0.035f); drawCylinder(MAX_X+cr*0.155f, cy-th, MIN_Z-cr*0.155f, 25*th, cr*0.035f); drawCylinder(MIN_X-cr*0.155f, cy-th, MIN_Z-cr*0.155f, 25*th, cr*0.035f); drawCylinder(MIN_X-cr*0.155f, cy-th, MAX_Z+cr*0.155f, 25*th, cr*0.035f); } void drawGround() { int th = 5.0f; GLfloat cx = MIN_X+(MAX_X-MIN_X)/2.0f; GLfloat cy = MIN_Y-0.1f; GLfloat cz = MIN_Z+(MAX_Z-MIN_Z)/2.0f; GLfloat cr = sqrt((MAX_X-MIN_X)*(MAX_X-MIN_X)+(MAX_Z-MIN_Z)*(MAX_Z-MIN_Z))*8.5f; glColor3f(0.0f, 0.6f, 0.0f); drawCylinder(cx,cy-26*th,cz,10.f,cr); } void drawContainer() { glColor3f(0.2f, 0.2f, 0.2f); drawCuboid(MIN_X-0.5, MAX_X+0.5f, MIN_Y-0.5, MIN_Y+0.5, MIN_Z-0.5f, MIN_Z+0.5f); drawCuboid(MIN_X-0.5, MAX_X+0.5f, MIN_Y-0.5, MIN_Y+0.5, MAX_Z-0.5f, MAX_Z+0.5f); drawCuboid(MIN_X-0.5, MAX_X+0.5f, MAX_Y-0.5, MAX_Y+0.5, MIN_Z-0.5f, MIN_Z+0.5f); drawCuboid(MIN_X-0.5, MAX_X+0.5f, MAX_Y-0.5, MAX_Y+0.5, MAX_Z-0.5f, MAX_Z+0.5f); drawCuboid(MIN_X-0.5, MIN_X+0.5f, MIN_Y-0.5, MAX_Y+0.5, MIN_Z-0.5f, MIN_Z+0.5f); drawCuboid(MIN_X-0.5, MIN_X+0.5f, MIN_Y-0.5, MAX_Y+0.5, MAX_Z-0.5f, MAX_Z+0.5f); drawCuboid(MAX_X-0.5, MAX_X+0.5f, MIN_Y-0.5, MAX_Y+0.5, MIN_Z-0.5f, MIN_Z+0.5f); drawCuboid(MAX_X-0.5, MAX_X+0.5f, MIN_Y-0.5, MAX_Y+0.5, MAX_Z-0.5f, MAX_Z+0.5f); drawCuboid(MIN_X-0.5, MIN_X+0.5f, MIN_Y-0.5, MIN_Y+0.5, MIN_Z-0.5f, MAX_Z+0.5f); drawCuboid(MIN_X-0.5, MIN_X+0.5f, MAX_Y-0.5, MAX_Y+0.5, MIN_Z-0.5f, MAX_Z+0.5f); drawCuboid(MAX_X-0.5, MAX_X+0.5f, MIN_Y-0.5, MIN_Y+0.5, MIN_Z-0.5f, MAX_Z+0.5f); drawCuboid(MAX_X-0.5, MAX_X+0.5f, MAX_Y-0.5, MAX_Y+0.5, MIN_Z-0.5f, MAX_Z+0.5f); glEnable(GL_BLEND); glDisable(GL_DEPTH_TEST); glColor4f(0.5f,1.0f,1.0f,0.12f); drawCuboid(MIN_X,MAX_X,MIN_Y,MAX_Y,MIN_Z,MAX_Z); glDisable(GL_BLEND); glEnable(GL_DEPTH_TEST); } </code></pre>
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    1. PTQuestion
    1. USIchibann
    1. USIchibann
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POOpenGL blend problem
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. VTFavorite
    3. VO
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      1. This table or related slice is empty.
      1. VTUpMod
    1. COIndent your code better.
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    2. COOk. I've done that.
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      1. POOpenGL blend problem
      1. USIchibann
 

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