Examples of javax.media.opengl.GL2

javax.media.opengl.GL2


  private final Vec2 trans = new Vec2();


  @Override
  public void drawSolidPolygon(Vec2[] vertices, int vertexCount, Color3f color) {
    GL2 gl = panel.getGL().getGL2();
    gl.glBegin(GL2.GL_TRIANGLE_FAN);
    gl.glColor4f(color.x, color.y, color.z, .4f);
    for (int i = 0; i < vertexCount; i++) {
      getWorldToScreenToOut(vertices[i], trans);
      gl.glVertex2f(trans.x, trans.y);
    }
    gl.glEnd();


    gl.glBegin(GL2.GL_LINE_LOOP);
    gl.glColor4f(color.x, color.y, color.z, 1f);
    for (int i = 0; i < vertexCount; i++) {
      getWorldToScreenToOut(vertices[i], trans);
      gl.glVertex2f(trans.x, trans.y);
    }
    gl.glEnd();
  }

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    drawSegment(center, vecs[0], color);
  }


  @Override
  public void drawSegment(Vec2 p1, Vec2 p2, Color3f color) {
    GL2 gl = panel.getGL().getGL2();
    gl.glBegin(GL2.GL_LINES);
    gl.glColor3f(color.x, color.y, color.z);
    getWorldToScreenToOut(p1, trans);
    gl.glVertex2f(trans.x, trans.y);
    getWorldToScreenToOut(p2, trans);
    gl.glVertex2f(trans.x, trans.y);
    gl.glEnd();
  }

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  private final Vec2 temp = new Vec2();
  private final Vec2 temp2 = new Vec2();


  @Override
  public void drawTransform(Transform xf) {
    GL2 gl = panel.getGL().getGL2();
    getWorldToScreenToOut(xf.p, temp);
    temp2.setZero();
    float k_axisScale = 0.4f;


    gl.glBegin(GL2.GL_LINES);
    gl.glColor3f(1, 0, 0);


    temp2.x = xf.p.x + k_axisScale * xf.q.c;
    temp2.y = xf.p.y + k_axisScale * xf.q.s;
    getWorldToScreenToOut(temp2, temp2);
    gl.glVertex2f(temp.x, temp.y);
    gl.glVertex2f(temp2.x, temp2.y);


    gl.glColor3f(0, 1, 0);
    temp2.x = xf.p.x + -k_axisScale * xf.q.s;
    temp2.y = xf.p.y + k_axisScale * xf.q.c;
    getWorldToScreenToOut(temp2, temp2);
    gl.glVertex2f(temp.x, temp.y);
    gl.glVertex2f(temp2.x, temp2.y);
    gl.glEnd();
  }

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    getGL().getGL2().glBlendFunc(GL2.GL_SRC_ALPHA, GL2.GL_ONE_MINUS_SRC_ALPHA);
  }


  @Override
  public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int arg3, int arg4) {
    GL2 gl2 = arg0.getGL().getGL2();


    gl2.glMatrixMode(GL2.GL_PROJECTION);
    gl2.glLoadIdentity();


    // coordinate system origin at lower left with width and height same as the window
    GLU glu = new GLU();
    glu.gluOrtho2D(0.0f, getWidth(), 0.0f, getHeight());


    gl2.glMatrixMode(GL2.GL_MODELVIEW);
    gl2.glLoadIdentity();


    gl2.glViewport(0, 0, getWidth(), getHeight());


    controller.updateExtents(arg3 / 2, arg4 / 2);
  }

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    void executeRasterDepth(Context ctx, float posX, float posY, float posZ,
            int srcOffsetX, int srcOffsetY, int rasterWidth, int rasterHeight,
            int depthWidth, int depthHeight, int depthFormat, Object depthData) {
        if (VERBOSE) System.err.println("JoglPipeline.executeRasterDepth()");
        GLContext context = context(ctx);
    GL2 gl = context.getGL().getGL2();




        gl.glRasterPos3f(posX, posY, posZ);


        int[] drawBuf = new int[1];
        gl.glGetIntegerv(GL2.GL_DRAW_BUFFER, drawBuf, 0);
        /* disable draw buffer */
        gl.glDrawBuffer(GL.GL_NONE);


        /*
         * raster position is upper left corner, default for Java3D
         * ImageComponent currently has the data reverse in Y
         */
        gl.glPixelZoom(1.0f, -1.0f);
        gl.glPixelStorei(GL2.GL_UNPACK_ROW_LENGTH, depthWidth);
        if (srcOffsetX >= 0) {
            gl.glPixelStorei(GL2.GL_UNPACK_SKIP_PIXELS, srcOffsetX);
            if (srcOffsetX + rasterWidth > depthWidth) {
                rasterWidth = depthWidth - srcOffsetX;
            }
        } else {
            rasterWidth += srcOffsetX;
            if (rasterWidth > depthWidth) {
                rasterWidth  = depthWidth;
            }
        }
        if (srcOffsetY >= 0) {
            gl.glPixelStorei(GL2.GL_UNPACK_SKIP_ROWS, srcOffsetY);
            if (srcOffsetY + rasterHeight > depthHeight) {
                rasterHeight = depthHeight - srcOffsetY;
            }
        } else {
      rasterHeight += srcOffsetY;
      if (rasterHeight > depthHeight) {
        rasterHeight = depthHeight;
      }
        }




        if (depthFormat == DepthComponentRetained.DEPTH_COMPONENT_TYPE_INT) {
            gl.glDrawPixels(rasterWidth, rasterHeight, GL2.GL_DEPTH_COMPONENT,
                    GL.GL_UNSIGNED_INT, IntBuffer.wrap((int[]) depthData));
        } else { /* DepthComponentRetained.DEPTH_COMPONENT_TYPE_FLOAT */
            gl.glDrawPixels(rasterWidth, rasterHeight, GL2.GL_DEPTH_COMPONENT,
                    GL.GL_FLOAT, FloatBuffer.wrap((float[]) depthData));
        }


        /* re-enable draw buffer */
        gl.glDrawBuffer(drawBuf[0]);


        gl.glPixelStorei(GL2.GL_UNPACK_ROW_LENGTH, 0);
        gl.glPixelStorei(GL2.GL_UNPACK_SKIP_PIXELS, 0);
        gl.glPixelStorei(GL2.GL_UNPACK_SKIP_ROWS, 0);


    }

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    // The native method for setting the ModelView matrix.
    @Override
    void setModelViewMatrix(Context ctx, double[] viewMatrix, double[] modelMatrix) {
        if (VERBOSE) System.err.println("JoglPipeline.setModelViewMatrix()");
        GLContext context = context(ctx);
    GL2 gl = context.getGL().getGL2();


        gl.glMatrixMode(GL2.GL_MODELVIEW);


        if (gl.isExtensionAvailable("GL_VERSION_1_3")) {
            gl.glLoadTransposeMatrixd(viewMatrix, 0);
            gl.glMultTransposeMatrixd(modelMatrix, 0);
        } else {
            double[] v = new double[16];
            double[] m = new double[16];
            copyTranspose(viewMatrix, v);
            copyTranspose(modelMatrix, m);
            gl.glLoadMatrixd(v, 0);
            gl.glMultMatrixd(m, 0);
        }
    }

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    // The native method for setting the Projection matrix.
    @Override
    void setProjectionMatrix(Context ctx, double[] projMatrix) {
        if (VERBOSE) System.err.println("JoglPipeline.setProjectionMatrix()");
        GLContext context = context(ctx);
    GL2 gl = context.getGL().getGL2();


        gl.glMatrixMode(GL2.GL_PROJECTION);


        if (gl.isExtensionAvailable("GL_VERSION_1_3")) {
            // Invert the Z value in clipping coordinates because OpenGL uses
            // left-handed clipping coordinates, while Java3D defines right-handed
            // coordinates everywhere.
            projMatrix[8] *= -1.0;
            projMatrix[9] *= -1.0;
            projMatrix[10] *= -1.0;
            projMatrix[11] *= -1.0;
            gl.glLoadTransposeMatrixd(projMatrix, 0);
            projMatrix[8] *= -1.0;
            projMatrix[9] *= -1.0;
            projMatrix[10] *= -1.0;
            projMatrix[11] *= -1.0;
        } else {
            double[] p = new double[16];
            copyTranspose(projMatrix, p);
            // Invert the Z value in clipping coordinates because OpenGL uses
            // left-handed clipping coordinates, while Java3D defines right-handed
            // coordinates everywhere.
            p[2] *= -1.0;
            p[6] *= -1.0;
            p[10] *= -1.0;
            p[14] *= -1.0;
            gl.glLoadMatrixd(p, 0);
        }
    }

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        @Override
        public void init(GLContext context) {
            // This is basically a temporary
            JoglContext jctx = new JoglContext(context);
            GL2 gl = context.getGL().getGL2();
            // Set up various properties
            if (getPropertiesFromCurrentContext(jctx, gl)) {
                setupCanvasProperties(canvas, jctx, gl);
            }
            markDone();

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        if (VERBOSE) System.err.println("JoglPipeline.newDisplayList()");
        if (displayListId <= 0) {
            System.err.println("JAVA 3D ERROR : glNewList(" + displayListId + ") -- IGNORED");
        }


    GL2 gl = context(ctx).getGL().getGL2();
        gl.glNewList(displayListId, GL2.GL_COMPILE);
    }

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    }


    @Override
    void endDisplayList(Context ctx) {
        if (VERBOSE) System.err.println("JoglPipeline.endDisplayList()");
    GL2 gl = context(ctx).getGL().getGL2();
        gl.glEndList();
    }

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