opengl redbook samples.htm

openGL programming guid---the redbook,介绍openGL C++编程

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      <P>This program demonstrates using mipmaps for texture maps. To overtly 
      show the effect of mipmaps, each mipmap reduction level has a solidly 
      colored, contrasting texture image. Thus, the quadrilateral which is drawn 
      is drawn with several different colors.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/model.c">model.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/movelight.jpg" 
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      <P>This program demonstrates when to issue lighting and transformation 
      commands to render a model with a light which is moved by a modeling 
      transformation (rotate or translate). The light position is reset after 
      the modeling transformation is called. The eye position does not change. A 
      sphere is drawn using a grey material characteristic. A single light 
      source illuminates the object. Interaction: pressing the left mouse button 
      alters the modeling transformation (x rotation) by 30 degrees. The scene 
      is then redrawn with the light in a new position.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/movelight.c">movelight.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/pickdepth.jpg" 
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      <P>Picking is demonstrated in this program. In rendering mode, three 
      overlapping rectangles are drawn. When the left mouse button is pressed, 
      selection mode is entered with the picking matrix. Rectangles which are 
      drawn under the cursor position are "picked." Pay special attention to the 
      depth value range, which is returned.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/pickdepth.c">pickdepth.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/picksquare.jpg" 
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      <P>Use of multiple names and picking are demonstrated. A 3x3 grid of 
      squares is drawn. When the left mouse button is pressed, all squares under 
      the cursor position have their color changed.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/picksquare.c">picksquare.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/planet.jpg" 
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      <P>This program shows how to composite modeling transformations to draw 
      translated and rotated models. Interaction: pressing the d and y keys (day 
      and year) alters the rotation of the planet around the sun.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/planet.c">planet.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/polyoff.jpg" 
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      <P>This program demonstrates polygon offset to draw a shaded polygon and 
      its wireframe counterpart without ugly visual artifacts ("stitching").</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/polyoff.c">polyoff.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/polys.jpg" 
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      <P>This program demonstrates polygon stippling.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/polys.c">polys.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/quadric.jpg" 
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      <P>This program demonstrates the use of some of the gluQuadric* routines. 
      Quadric objects are created with some quadric properties and the callback 
      routine to handle errors. Note that the cylinder has no top or bottom and 
      the circle has a hole in it.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/quadric.c">quadric.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/robot.jpg" 
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      <P>This program shows how to composite modeling transformations to draw 
      translated and rotated hierarchical models. Interaction: pressing the s 
      and e keys (shoulder and elbow) alters the rotation of the robot arm.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/robot.c">robot.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/scene.jpg" 
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      <P>This program demonstrates the use of the GL lighting model. Objects are 
      drawn using a grey material characteristic. A single light source 
      illuminates the objects.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/scene.c">scene.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/select.jpg" 
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      <P>This is an illustration of the selection mode and name stack, which 
      detects whether objects which collide with a viewing volume. First, four 
      triangles and a rectangular box representing a viewing volume are drawn 
      (drawScene routine). The green triangle and yellow triangles appear to lie 
      within the viewing volume, but the red triangle appears to lie outside it. 
      Then the selection mode is entered (selectObjects routine). Drawing to the 
      screen ceases. To see if any collisions occur, the four triangles are 
      called. In this example, the green triangle causes one hit with the name 
      1, and the yellow triangles cause one hit with the name 3.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/select.c">select.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/smooth.jpg" 
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      <P>This program demonstrates smooth shading. A smooth shaded polygon is 
      drawn in a 2-D projection.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/smooth.c">smooth.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/stencil.jpg" 
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      <P>This program draws two rotated tori in a window. A diamond in the 
      center of the window masks out part of the scene. Within this mask, a 
      different model (a sphere) is drawn in a different color.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/stencil.c">stencil.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/stroke.jpg" 
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      <P>This program demonstrates some characters of a stroke (vector) font. 
      The characters are represented by display lists, which are given numbers 
      which correspond to the ASCII values of the characters. Use of 
      glCallLists() is demonstrated.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/stroke.c">stroke.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/surface.jpg" 
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      <P>This program draws a NURBS surface in the shape of a symmetrical 
      hill.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/surface.c">surface.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/teapots.jpg" 
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      <P>This program demonstrates lots of material properties. A single light 
      source illuminates the objects.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/teapots.c">teapots.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/tess.jpg" 
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      <P>This program demonstrates polygon tessellation. Two tesselated objects 
      are drawn. The first is a rectangle with a triangular hole. The second is 
      a smooth shaded, self-intersecting star. Note the exterior rectangle is 
      drawn with its vertices in counter-clockwise order, but its interior 
      clockwise. Note the combineCallback is needed for the self-intersecting 
      star. Also note that removing the TessProperty for the star will make the 
      interior unshaded (WINDING_ODD).</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/tess.c">tess.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/tesswind.jpg" 
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      <P>This program demonstrates the winding rule polygon tessellation 
      property. Four tessellated objects are drawn, each with very different 
      contours. When the w key is pressed, the objects are drawn with a 
      different winding rule.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/tesswind.c">tesswind.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/texbind.jpg" 
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      <P>This program demonstrates using glBindTexture() by creating and 
      managing two textures.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/texbind.c">texbind.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/texgen.jpg" 
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      <P>This program draws a texture mapped teapot with automatically generated 
      texture coordinates. The texture is rendered as stripes on the teapot. 
      Initially, the object is drawn with texture coordinates based upon the 
      object coordinates of the vertex and distance from the plane x = 0. 
      Pressing the 'e' key changes the coordinate generation to eye coordinates 
      of the vertex. Pressing the 'o' key switches it back to the object 
      coordinates. Pressing the 's' key changes the plane to a slanted one (x + 
      y + z = 0). Pressing the 'x' key switches it back to x = 0.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/texgen.c">texgen.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/texsub.jpg" 
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      <P>This program texture maps a checkerboard image onto two rectangles. 
      This program clamps the texture, if the texture coordinates fall outside 
      0.0 and 1.0. If the s key is pressed, a texture subimage is used to alter 
      the original texture. If the r key is pressed, the original texture is 
      restored.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/texsub.c">texsub.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/texturesurf.jpg" 
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      <P>This program uses evaluators to generate a curved surface and 
      automatically generated texture coordinates.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/texturesurf.c">texturesurf.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/torus.jpg" 
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      <P>This program demonstrates the creation of a display list.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/torus.c">torus.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/trim.jpg" 
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      <P>This program draws a NURBS surface in the shape of a symmetrical hill, 
      using both a NURBS curve and pwl (piecewise linear) curve to trim part of 
      the surface.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/trim.c">trim.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/varray.jpg" 
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      <P>This program demonstrates vertex arrays.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/varray.c">varray.c</A>.</P></TD></TR></TBODY></TABLE><BR>
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    <TD><IMG height=256 src="OpenGL Redbook Samples.files/wrap.jpg" 
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      <P>This program texture maps a checkerboard image onto two rectangles. 
      This program demonstrates the wrapping modes, if the texture coordinates 
      fall outside 0.0 and 1.0. Interaction: Pressing the 's' and 'S' keys 
      switch the wrapping between clamping and repeating for the s parameter. 
      The 't' and 'T' keys control the wrapping for the t parameter. If running 
      this program on OpenGL 1.0, texture objects are not used.</P>
      <P>Source code: <A 
      href="http://www.opengl.org/resources/code/samples/redbook/wrap.c">wrap.c</A>.</P></TD></TR></TBODY></TABLE></BODY></HTML>