Difference between revisions 1362 and 1363 on hiwikiversity{{Computer graphics -- 2013-2014 -- info.uvt.ro/Page header}}
=== एंटीअलियासिंग===
* '' 'रंग ब्लेंडिंग' '' -
<source lang="Java">
[...]
public void init(GLAutoDrawable canvas)
{
(contracted; show full) [...]
}
</source>
लिंक:
* [http://www.felixgers.de/teaching/jogl/polygonPrimitives.html बहुभुज प्रिमिटिवस]
=== बहुभुज भरने और ओरिएंटेशन
(Polygon filling and orientation) ===
<source lang="java">
public class MainFrame
{
[...]
public void display(GLAutoDrawable canvas) {
GL2 gl = canvas.getGL().getGL2();
[...]
// Do not render front-faced polygons.
gl.glCullFace(GL.GL_FRONT);
// Culling must be enabled in order to work.
gl.glEnable(GL.GL_CULL_FACE);
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
// Define vertices in clockwise order (back-faced)
gl.glBegin(GL2.GL_POLYGON);
gl.glColor3f(1.f, 0.f, 0.f);
gl.glVertex2f(0.2f, 0.2f);
gl.glColor3f(0.f, 1.f, 0.f);
gl.glVertex2f(0.2f, 0.4f);
gl.glColor3f(0.f, 0.f, 1.f);
gl.glVertex2f(0.4f, 0.4f);
gl.glColor3f(1.f, 1.f, 1.f);
gl.glVertex2f(0.4f, 0.2f);
gl.glEnd();
[...]
}
[...]
}
</source>
<source lang="java">
public class MainFrame
{
[...]
public void display(GLAutoDrawable canvas) {
GL2 gl = canvas.getGL().getGL2();
[...]
// Do not render back-faced polygons.
gl.glCullFace(GL.GL_BACK);
// Culling must be enabled in order to work.
gl.glEnable(GL.GL_CULL_FACE);
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
// Define vertices in clockwise order (back-faced).
gl.glBegin(GL2.GL_POLYGON);
gl.glColor3f(1.f, 0.f, 0.f);
gl.glVertex2f(0.2f, 0.2f);
gl.glColor3f(0.f, 1.f, 0.f);
gl.glVertex2f(0.2f, 0.4f);
gl.glColor3f(0.f, 0.f, 1.f);
gl.glVertex2f(0.4f, 0.4f);
gl.glColor3f(1.f, 1.f, 1.f);
gl.glVertex2f(0.4f, 0.2f);
gl.glEnd();
[...]
}
[...]
}
</source>
=== बहुभुज स्टिपल (Polygon stipple)===
<source lang="java">
public class MainFrame
{
[...]
byte mask[] = {
(contracted; show full) gl.glDisable (GL2.GL_POLYGON_STIPPLE);
[...]
}
[...]
}
</source>
=== बहुभुज नार्मल (Polygon normals)===
<source lang="java">
public class MainFrame
{
[...]
public void display(GLAutoDrawable canvas) {
GL2 gl = canvas.getGL().getGL2();
[...]
// Do not render front-faced polygons.
gl.glCullFace(GL.GL_FRONT);
// Culling must be enabled in order to work.
gl.glEnable(GL.GL_CULL_FACE);
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
// Define vertices in clockwise order (back-faced).
gl.glBegin(GL2.GL_POLYGON);
// Define normal for vertex 1
gl.glNormal3f(0.f, 0.f, 1.f);
gl.glColor3f(1.f, 0.f, 0.f);
gl.glVertex2f(0.2f, 0.2f);
// Define normal for vertex 2
gl.glNormal3f(0.f, 0.f, 1.f);
gl.glColor3f(0.f, 1.f, 0.f);
gl.glVertex2f(0.2f, 0.4f);
// Define normal for vertex 3
gl.glNormal3f(0.f, 0.f, 1.f);
gl.glColor3f(0.f, 0.f, 1.f);
gl.glVertex2f(0.4f, 0.4f);
// Define normal for vertex 4
gl.glNormal3f(0.f, 0.f, 1.f);
gl.glColor3f(1.f, 1.f, 1.f);
gl.glVertex2f(0.4f, 0.2f);
gl.glEnd();
[...]
}
[...]
}
</source>
==== बम्प मैपिंग प्राइमर (Bump mapping primer)====
=== बिल्डिंग डिस्प्ले सूचियाँ (Building Display Lists)===
<source lang="java">
public class MainFrame
{
[...]
int aCircle;
public void init(GLAutoDrawable canvas)
{
[...]
// Generate a unique ID for our list.
aCircle = gl.glGenLists(1);
// Generate the Display List
gl.glNewList(aCircle, GL2.GL_COMPILE);
drawCircle(gl, 0.5f, 0.5f, 0.4f);
gl.glEndList();
}
int aCircle;
public void display(GLAutoDrawable canvas) {
GL2 gl = canvas.getGL().getGL2();
[...]
gl.glColor3f(1.0f, 1.0f, 1.0f);
// Call the Display List i.e. call the commands stored in it.
gl.glCallList(aCircle);
}
// Here we define the function for building a circle from line segments.
private void drawCircle(GL gl, float xCenter, float yCenter, float radius) {
double x,y, angle;
gl.glBegin(GL2.GL_LINE_LOOP);
for (int i=0; i<360; i++) {
angle = Math.toRadians(i);
x = radius * Math.cos(angle);
y = radius * Math.sin(angle);
gl.glVertex2d(xCenter + x, yCenter + y);
}
gl.glEnd();
}
[...]
}
</source>
== एपीआई (API) ==
* [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/package-summary.html java.media.opengl];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html GL];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glPolygonMode(int,%20int) glPolygonMode(int, int)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glRectd(double,%20double,%20double,%20double) glRect(double, double, double, double)];
** [http://www.opengl.org/sdk/docs/man/xhtml/glPolygonStipple.xml glPolygonStipple(ByteBuffer)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glCullFace(int) glCullFace(int)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glFrontFace(int) glFrontFace(int)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glNormal3f(float,%20float,%20float) glNormal3f(float, float, float)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glGenLists(int) glGenLists(int)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glNewList(int,%20int) glNewList(int, int)];
** [http://download.java.net/media/jogl/builds/nightly/javadoc_public/javax/media/opengl/GL.html#glEndList() glEndList()];
== अभ्यास (Exercises)==⏎
⏎
[[Category:HI]]
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