diff options
Diffstat (limited to 'src/net/java/games/jogl/util/GLUT.java')
| -rw-r--r-- | src/net/java/games/jogl/util/GLUT.java | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/src/net/java/games/jogl/util/GLUT.java b/src/net/java/games/jogl/util/GLUT.java index 36b54d6b1..70144d66e 100644 --- a/src/net/java/games/jogl/util/GLUT.java +++ b/src/net/java/games/jogl/util/GLUT.java @@ -204,6 +204,74 @@ public class GLUT { tetrahedron(gl, GL.GL_TRIANGLES); } +/** + * Renders the teapot as a solid shape of the specified size. The teapot is + * created in a way that replicates the C GLUT implementation. + * + * @param gl + * the OpenGL context in which to render the teapot + * @param scale + * the factor by which to scale the teapot + */ + public void glutSolidTeapot(GL gl, double scale) { + glutSolidTeapot(gl, scale, true); + } + + /** + * Renders the teapot as a solid shape of the specified size. The teapot can + * either be created in a way that is backward-compatible with the standard + * C glut library (i.e. broken), or in a more pleasing way (i.e. with + * surfaces whose front-faces point outwards and standing on the z=0 plane, + * instead of the y=-1 plane). Both surface normals and texture coordinates + * for the teapot are generated. The teapot is generated with OpenGL + * evaluators. + * + * @param gl + * the OpenGL context in which to render the teapot + * @param scale + * the factor by which to scale the teapot + * @param cStyle + * whether to create the teapot in exactly the same way as in the C + * implementation of GLUT + */ + public void glutSolidTeapot(GL gl, double scale, boolean cStyle) { + teapot(gl, 14, scale, GL.GL_FILL, cStyle); + } + + /** + * Renders the teapot as a wireframe shape of the specified size. The teapot + * is created in a way that replicates the C GLUT implementation. + * + * @param gl + * the OpenGL context in which to render the teapot + * @param scale + * the factor by which to scale the teapot + */ + public void glutWireTeapot(GL gl, double scale) { + glutWireTeapot(gl, scale, true); + } + + /** + * Renders the teapot as a wireframe shape of the specified size. The teapot + * can either be created in a way that is backward-compatible with the + * standard C glut library (i.e. broken), or in a more pleasing way (i.e. + * with surfaces whose front-faces point outwards and standing on the z=0 + * plane, instead of the y=-1 plane). Both surface normals and texture + * coordinates for the teapot are generated. The teapot is generated with + * OpenGL evaluators. + * + * @param gl + * the OpenGL context in which to render the teapot + * @param scale + * the factor by which to scale the teapot + * @param cStyle + * whether to create the teapot in exactly the same way as in the C + * implementation of GLUT + */ + public void glutWireTeapot(GL gl, double scale, boolean cStyle) { + teapot(gl, 10, scale, GL.GL_LINE, cStyle); + } + //---------------------------------------------------------------------- // Fonts // @@ -736,6 +804,282 @@ public class GLUT { drawtriangle(gl, i, tdata, tndex, shadeType); } + // Teapot implementation (a modified port of glut_teapot.c) + // + // Rim, body, lid, and bottom data must be reflected in x and + // y; handle and spout data across the y axis only. + private static final int[][] teapotPatchData = { + /* rim */ + {102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}, + /* body */ + {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27}, + {24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40}, + /* lid */ + {96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3,}, + {0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117}, + /* bottom */ + {118, 118, 118, 118, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37}, + /* handle */ + {41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56}, + {53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 28, 65, 66, 67}, + /* spout */ + {68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83}, + {80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95} + }; + private static final float[][] teapotCPData = { + {0.2f, 0f, 2.7f}, + {0.2f, -0.112f, 2.7f}, + {0.112f, -0.2f, 2.7f}, + {0f, -0.2f, 2.7f}, + {1.3375f, 0f, 2.53125f}, + {1.3375f, -0.749f, 2.53125f}, + {0.749f, -1.3375f, 2.53125f}, + {0f, -1.3375f, 2.53125f}, + {1.4375f, 0f, 2.53125f}, + {1.4375f, -0.805f, 2.53125f}, + {0.805f, -1.4375f, 2.53125f}, + {0f, -1.4375f, 2.53125f}, + {1.5f, 0f, 2.4f}, + {1.5f, -0.84f, 2.4f}, + {0.84f, -1.5f, 2.4f}, + {0f, -1.5f, 2.4f}, + {1.75f, 0f, 1.875f}, + {1.75f, -0.98f, 1.875f}, + {0.98f, -1.75f, 1.875f}, + {0f, -1.75f, 1.875f}, + {2f, 0f, 1.35f}, + {2f, -1.12f, 1.35f}, + {1.12f, -2f, 1.35f}, + {0f, -2f, 1.35f}, + {2f, 0f, 0.9f}, + {2f, -1.12f, 0.9f}, + {1.12f, -2f, 0.9f}, + {0f, -2f, 0.9f}, + {-2f, 0f, 0.9f}, + {2f, 0f, 0.45f}, + {2f, -1.12f, 0.45f}, + {1.12f, -2f, 0.45f}, + {0f, -2f, 0.45f}, + {1.5f, 0f, 0.225f}, + {1.5f, -0.84f, 0.225f}, + {0.84f, -1.5f, 0.225f}, + {0f, -1.5f, 0.225f}, + {1.5f, 0f, 0.15f}, + {1.5f, -0.84f, 0.15f}, + {0.84f, -1.5f, 0.15f}, + {0f, -1.5f, 0.15f}, + {-1.6f, 0f, 2.025f}, + {-1.6f, -0.3f, 2.025f}, + {-1.5f, -0.3f, 2.25f}, + {-1.5f, 0f, 2.25f}, + {-2.3f, 0f, 2.025f}, + {-2.3f, -0.3f, 2.025f}, + {-2.5f, -0.3f, 2.25f}, + {-2.5f, 0f, 2.25f}, + {-2.7f, 0f, 2.025f}, + {-2.7f, -0.3f, 2.025f}, + {-3f, -0.3f, 2.25f}, + {-3f, 0f, 2.25f}, + {-2.7f, 0f, 1.8f}, + {-2.7f, -0.3f, 1.8f}, + {-3f, -0.3f, 1.8f}, + {-3f, 0f, 1.8f}, + {-2.7f, 0f, 1.575f}, + {-2.7f, -0.3f, 1.575f}, + {-3f, -0.3f, 1.35f}, + {-3f, 0f, 1.35f}, + {-2.5f, 0f, 1.125f}, + {-2.5f, -0.3f, 1.125f}, + {-2.65f, -0.3f, 0.9375f}, + {-2.65f, 0f, 0.9375f}, + {-2f, -0.3f, 0.9f}, + {-1.9f, -0.3f, 0.6f}, + {-1.9f, 0f, 0.6f}, + {1.7f, 0f, 1.425f}, + {1.7f, -0.66f, 1.425f}, + {1.7f, -0.66f, 0.6f}, + {1.7f, 0f, 0.6f}, + {2.6f, 0f, 1.425f}, + {2.6f, -0.66f, 1.425f}, + {3.1f, -0.66f, 0.825f}, + {3.1f, 0f, 0.825f}, + {2.3f, 0f, 2.1f}, + {2.3f, -0.25f, 2.1f}, + {2.4f, -0.25f, 2.025f}, + {2.4f, 0f, 2.025f}, + {2.7f, 0f, 2.4f}, + {2.7f, -0.25f, 2.4f}, + {3.3f, -0.25f, 2.4f}, + {3.3f, 0f, 2.4f}, + {2.8f, 0f, 2.475f}, + {2.8f, -0.25f, 2.475f}, + {3.525f, -0.25f, 2.49375f}, + {3.525f, 0f, 2.49375f}, + {2.9f, 0f, 2.475f}, + {2.9f, -0.15f, 2.475f}, + {3.45f, -0.15f, 2.5125f}, + {3.45f, 0f, 2.5125f}, + {2.8f, 0f, 2.4f}, + {2.8f, -0.15f, 2.4f}, + {3.2f, -0.15f, 2.4f}, + {3.2f, 0f, 2.4f}, + {0f, 0f, 3.15f}, + {0.8f, 0f, 3.15f}, + {0.8f, -0.45f, 3.15f}, + {0.45f, -0.8f, 3.15f}, + {0f, -0.8f, 3.15f}, + {0f, 0f, 2.85f}, + {1.4f, 0f, 2.4f}, + {1.4f, -0.784f, 2.4f}, + {0.784f, -1.4f, 2.4f}, + {0f, -1.4f, 2.4f}, + {0.4f, 0f, 2.55f}, + {0.4f, -0.224f, 2.55f}, + {0.224f, -0.4f, 2.55f}, + {0f, -0.4f, 2.55f}, + {1.3f, 0f, 2.55f}, + {1.3f, -0.728f, 2.55f}, + {0.728f, -1.3f, 2.55f}, + {0f, -1.3f, 2.55f}, + {1.3f, 0f, 2.4f}, + {1.3f, -0.728f, 2.4f}, + {0.728f, -1.3f, 2.4f}, + {0f, -1.3f, 2.4f}, + {0f, 0f, 0f}, + {1.425f, -0.798f, 0f}, + {1.5f, 0f, 0.075f}, + {1.425f, 0f, 0f}, + {0.798f, -1.425f, 0f}, + {0f, -1.5f, 0.075f}, + {0f, -1.425f, 0f}, + {1.5f, -0.84f, 0.075f}, + {0.84f, -1.5f, 0.075f} + }; + // Since GL.glMap2f expects a packed array of floats, we must convert + // from a 3-dimensional array to a 1-dimensional array + private static final float[] teapotTex = { + 0, 0, 1, 0, 0, 1, 1, 1 + }; + + private static void teapot(GL gl, + int grid, + double scale, + int type, + boolean backCompatible) + { + // As mentioned above, GL.glMap2f expects a packed array of floats + float[] p = new float[4*4*3]; + float[] q = new float[4*4*3]; + float[] r = new float[4*4*3]; + float[] s = new float[4*4*3]; + int i, j, k, l; + + gl.glPushAttrib(GL.GL_ENABLE_BIT | GL.GL_EVAL_BIT | GL.GL_POLYGON_BIT); + gl.glEnable(GL.GL_AUTO_NORMAL); + gl.glEnable(GL.GL_NORMALIZE); + gl.glEnable(GL.GL_MAP2_VERTEX_3); + gl.glEnable(GL.GL_MAP2_TEXTURE_COORD_2); + if (!backCompatible) { + // The time has come to have the teapot no longer be inside out + gl.glFrontFace(GL.GL_CW); + gl.glScaled(0.5*scale, 0.5*scale, 0.5*scale); + } else { + // We want the teapot in it's backward compatible position and + // orientation + gl.glPushMatrix(); + gl.glRotatef(270.0f, 1, 0, 0); + gl.glScalef((float)(0.5 * scale), + (float)(0.5 * scale), + (float)(0.5 * scale)); + gl.glTranslatef(0.0f, 0.0f, -1.5f); + } + for (i = 0; i < 10; i++) { + for (j = 0; j < 4; j++) { + for (k = 0; k < 4; k++) { + for (l = 0; l < 3; l++) { + p[(j*4+k)*3+l] = teapotCPData[teapotPatchData[i][j * 4 + k]][l]; + q[(j*4+k)*3+l] = + teapotCPData[teapotPatchData[i][j * 4 + (3 - k)]][l]; + if (l == 1) + q[(j*4+k)*3+l] *= -1.0; + if (i < 6) { + r[(j*4+k)*3+l] = + teapotCPData[teapotPatchData[i][j * 4 + (3 - k)]][l]; + if (l == 0) + r[(j*4+k)*3+l] *= -1.0; + s[(j*4+k)*3+l] = teapotCPData[teapotPatchData[i][j * 4 + k]][l]; + if (l == 0) + s[(j*4+k)*3+l] *= -1.0; + if (l == 1) + s[(j*4+k)*3+l] *= -1.0; + } + } + } + } + gl.glMap2f(GL.GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2, teapotTex); + gl.glMap2f(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, p); + gl.glMapGrid2f(grid, 0.0f, 1.0f, grid, 0.0f, 1.0f); + evaluateTeapotMesh(gl, grid, type, i, !backCompatible); + gl.glMap2f(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, q); + evaluateTeapotMesh(gl, grid, type, i, !backCompatible); + if (i < 6) { + gl.glMap2f(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, r); + evaluateTeapotMesh(gl, grid, type, i, !backCompatible); + gl.glMap2f(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, s); + evaluateTeapotMesh(gl, grid, type, i, !backCompatible); + } + } + if (backCompatible) { + gl.glPopMatrix(); + } + gl.glPopAttrib(); + } + + private static void evaluateTeapotMesh(GL gl, + int grid, + int type, + int partNum, + boolean repairSingularities) + { + if (repairSingularities && (partNum == 5 || partNum == 3)) { + // Instead of using evaluators that give bad results at singularities, + // evaluate by hand + gl.glPolygonMode(GL.GL_FRONT_AND_BACK, type); + for (int nv = 0; nv < grid; nv++) { + if (nv == 0) { + // Draw a small triangle-fan to fill the hole + gl.glDisable(GL.GL_AUTO_NORMAL); + gl.glNormal3f(0, 0, partNum == 3 ? 1 : -1); + gl.glBegin(GL.GL_TRIANGLE_FAN); + { + gl.glEvalCoord2f(0, 0); + // Note that we draw in clock-wise order to match the evaluator + // method + for (int nu = 0; nu <= grid; nu++) + { + gl.glEvalCoord2f(nu / (float)grid, (1f / grid) / (float)grid); + } + } + gl.glEnd(); + gl.glEnable(GL.GL_AUTO_NORMAL); + } + // Draw the rest of the piece as an evaluated quad-strip + gl.glBegin(GL.GL_QUAD_STRIP); + { + // Note that we draw in clock-wise order to match the evaluator method + for (int nu = grid; nu >= 0; nu--) { + gl.glEvalCoord2f(nu / (float)grid, (nv + 1) / (float)grid); + gl.glEvalCoord2f(nu / (float)grid, Math.max(nv, 1f / grid) + / (float)grid); + } + } + gl.glEnd(); + } + } else { + gl.glEvalMesh2(type, 0, grid, 0, grid); + } + } + //---------------------------------------------------------------------- // Font implementation // |