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source: nanovis/trunk/Grid.cpp @ 5224

Last change on this file since 5224 was 4902, checked in by ldelgass, 9 years ago
sync with release branch
Property svn:eol-style set to `native`
File size: 8.6 KB

Line
1	/* -- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -- */
2	/*
3	* Copyright (c) 2004-2013 HUBzero Foundation, LLC
4	*
5	*/
6	#include <stdlib.h>
7	#include <stdio.h>
8
9	#include <GL/glew.h>
10	#include <GL/gl.h>
11
12	#include <util/Fonts.h>
13	#include <vrmath/Color4f.h>
14
15	#include "Grid.h"
16	#include "Trace.h"
17
18	using namespace nv;
19	using namespace nv::util;
20
21	#define NUMDIGITS 6
22	#define TICK_LENGTH 0.05
23	#define LABEL_OFFSET 0.06
24	#define TITLE_OFFSET 0.2
25
26	Grid::Grid() :
27	xAxis("X"),
28	yAxis("Y"),
29	zAxis("Z"),
30	_axisColor(1.0f, 1.0f, 1.0f, 1.0f),
31	_majorColor(1.0f, 1.0f, 1.0f, 1.0f),
32	_minorColor(0.5f, 0.5f, 0.5f, 1.0f),
33	_font(NULL),
34	_visible(false)
35	{
36	}
37
38	Grid::~Grid()
39	{
40	}
41
42	void Grid::getBounds(vrmath::Vector3f& bboxMin, vrmath::Vector3f& bboxMax) const
43	{
44	bboxMin.set(xAxis.min(), yAxis.min(), zAxis.min());
45	bboxMax.set(xAxis.min() + xAxis.range(),
46	yAxis.min() + yAxis.range(),
47	zAxis.min() + zAxis.range());
48	}
49
50	void Grid::render()
51	{
52	if (!isVisible())
53	return;
54
55	glPushAttrib(GL_ENABLE_BIT);
56
57	glEnable(GL_DEPTH_TEST);
58	glDisable(GL_TEXTURE_2D);
59	#ifdef notdef
60	glEnable(GL_BLEND);
61	glEnable(GL_LINE_SMOOTH);
62	#else
63	glDisable(GL_BLEND);
64	#endif
65
66	glMatrixMode(GL_MODELVIEW);
67	glPushMatrix();
68
69	double xLen = xAxis.range();
70	double yLen = yAxis.range();
71	double zLen = zAxis.range();
72	double avgLen = 0.;
73	double denom = 0.;
74	if (xLen > 0.0) {
75	avgLen += xLen;
76	denom += 1.0;
77	}
78	if (yLen > 0.0) {
79	avgLen += yLen;
80	denom += 1.0;
81	}
82	if (zLen > 0.0) {
83	avgLen += zLen;
84	denom += 1.0;
85	}
86	if (denom > 0.0) {
87	avgLen /= denom;
88	} else {
89	avgLen = 1.0;
90	}
91	float xTickLen = (TICK_LENGTH * avgLen) / xLen;
92	float yTickLen = (TICK_LENGTH * avgLen) / yLen;
93	float zTickLen = (TICK_LENGTH * avgLen) / zLen;
94	float xLabelOfs = (LABEL_OFFSET * avgLen) / xLen;
95	//float yLabelOfs = (LABEL_OFFSET * avgLen) / yLen;
96	float zLabelOfs = (LABEL_OFFSET * avgLen) / zLen;
97	float xTitleOfs = (TITLE_OFFSET * avgLen) / xLen;
98	float yTitleOfs = (TITLE_OFFSET * avgLen) / yLen;
99	float zTitleOfs = (TITLE_OFFSET * avgLen) / zLen;
100
101	glTranslated(xAxis.min(), yAxis.min(), zAxis.min());
102	glScaled(xLen, yLen, zLen);
103
104	glLineWidth(2.0f);
105	glColor4f(_axisColor.r, _axisColor.g, _axisColor.b,
106	_axisColor.a);
107
108	glBegin(GL_LINES);
109	{
110	glVertex3f(0.0f, 0.0f, 0.0f);
111	glVertex3f(1.0f + xTickLen, 0.0f, 0.0f);
112	glVertex3f(0.0f, 0.0f, 0.0f);
113	glVertex3f(0.0f, 1.0f + yTickLen, 0.0f);
114	glVertex3f(0.0f, 0.0f, 0.0f);
115	glVertex3f(0.0f, 0.0f, 1.0f + zTickLen);
116	}
117	glEnd();
118
119	glLineWidth(1.0f);
120	glColor4f(_majorColor.r, _majorColor.g, _majorColor.b,
121	_majorColor.a);
122
123	glBegin(GL_LINES);
124	{
125	bool result;
126	TickIter iter;
127
128	for (result = xAxis.firstMajor(iter); result; result = iter.next()) {
129	float x;
130	x = xAxis.map(iter.getValue());
131	glVertex3f(x, 0.0f, 0.0f);
132	glVertex3f(x, 1.0f, 0.0f);
133	glVertex3f(x, 0.0f, 0.0f);
134	glVertex3f(x, 0.0f, 1.0f + zTickLen);
135	}
136	for (result = yAxis.firstMajor(iter); result; result = iter.next()) {
137	float y;
138	y = yAxis.map(iter.getValue());
139	glVertex3f(0.0f, y, 0.0f);
140	glVertex3f(1.0f + xTickLen, y, 0.0f);
141	glVertex3f(0.0f, y, 0.0f);
142	glVertex3f(0.0f, y, 1.0f);
143	}
144	for (result = zAxis.firstMajor(iter); result; result = iter.next()) {
145	float z;
146	z = zAxis.map(iter.getValue());
147	glVertex3f(0.0f, 0.0f, z);
148	glVertex3f(0.0f, 1.0f, z);
149	glVertex3f(0.0f, 0.0f, z);
150	glVertex3f(1.0f + xTickLen, 0.0f, z);
151	}
152	}
153	glEnd();
154
155	// Set minor line color
156	glColor4f(_minorColor.r, _minorColor.g, _minorColor.b,
157	_minorColor.a);
158
159	glBegin(GL_LINES);
160	{
161	bool result;
162	TickIter iter;
163
164	for (result = xAxis.firstMinor(iter); result; result = iter.next()) {
165	float x;
166	x = xAxis.map(iter.getValue());
167	glVertex3f(x, 0.0f, 0.0f);
168	glVertex3f(x, 1.0f, 0.0f);
169	glVertex3f(x, 0.0f, 0.0f);
170	glVertex3f(x, 0.0f, 1.0f);
171	}
172	for (result = yAxis.firstMinor(iter); result; result = iter.next()) {
173	float y;
174	y = yAxis.map(iter.getValue());
175	glVertex3f(0.0f, y, 0.0f);
176	glVertex3f(1.0f, y, 0.0f);
177	glVertex3f(0.0f, y, 0.0f);
178	glVertex3f(0.0f, y, 1.0f);
179	}
180	for (result = zAxis.firstMinor(iter); result; result = iter.next()) {
181	float z;
182	z = zAxis.map(iter.getValue());
183	glVertex3f(0.0f, 0.0f, z);
184	glVertex3f(0.0f, 1.0f, z);
185	glVertex3f(0.0f, 0.0f, z);
186	glVertex3f(1.0f, 0.0f, z);
187	}
188	}
189	glEnd();
190
191	if (_font != NULL) {
192	double mv[16], prjm[16];
193	int viewport[4];
194	double wx, wy, wz;
195	bool result;
196	TickIter iter;
197
198	glGetDoublev(GL_MODELVIEW_MATRIX, mv);
199	glGetDoublev(GL_PROJECTION_MATRIX, prjm);
200	glGetIntegerv(GL_VIEWPORT, viewport);
201
202	_font->begin();
203
204	glColor4f(_axisColor.r, _axisColor.g, _axisColor.b,
205	_axisColor.a);
206
207	if (gluProject(1.0 + xTitleOfs, 0.0, 0.0,
208	mv, prjm, viewport,
209	&wx, &wy, &wz) &&
210	wz >= 0.0 && wz <= 1.0) {
211	glLoadIdentity();
212	glTranslatef((int) wx, viewport[3] - (int) wy, 0);
213	const char *name = xAxis.name();
214	if (name == NULL) {
215	name = "???";
216	}
217	_font->draw(name);
218	}
219
220	if (gluProject(0.0, 1.0 + yTitleOfs, 0.0,
221	mv, prjm, viewport,
222	&wx, &wy, &wz) &&
223	wz >= 0.0 && wz <= 1.0) {
224	glLoadIdentity();
225	glTranslatef((int) wx, viewport[3] - (int)wy, 0);
226	const char *name = yAxis.name();
227	if (name == NULL) {
228	name = "???";
229	}
230	_font->draw(name);
231	}
232
233	if (gluProject(0.0, 0.0, 1.0 + zTitleOfs,
234	mv, prjm, viewport,
235	&wx, &wy, &wz) &&
236	wz >= 0.0 && wz <= 1.0) {
237	glLoadIdentity();
238	glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f);
239	const char *name = zAxis.name();
240	if (name == NULL) {
241	name = "???";
242	}
243	_font->draw(name);
244	}
245
246	glColor4f(_majorColor.r, _majorColor.g, _majorColor.b,
247	_majorColor.a);
248
249	for (result = xAxis.firstMajor(iter); result; result = iter.next()) {
250	float x;
251	x = xAxis.map(iter.getValue());
252	if (gluProject(x, 0.0f, 1.0 + zLabelOfs,
253	mv, prjm, viewport,
254	&wx, &wy, &wz) &&
255	wz >= 0.0 && wz <= 1.0) {
256	char buff[20];
257	glLoadIdentity();
258	glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f);
259	sprintf(buff, "%.*g", NUMDIGITS, iter.getValue());
260	_font->draw(buff);
261	}
262	}
263	for (result = yAxis.firstMajor(iter); result; result = iter.next()) {
264	float y;
265	y = yAxis.map(iter.getValue());
266	if (gluProject(1.0 + xLabelOfs, y, 0.0f,
267	mv, prjm, viewport,
268	&wx, &wy, &wz) &&
269	wz >= 0.0 && wz <= 1.0) {
270	char buff[20];
271	glLoadIdentity();
272	glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f);
273	sprintf(buff, "%.*g", NUMDIGITS, iter.getValue());
274	_font->draw(buff);
275	}
276	}
277	for (result = zAxis.firstMajor(iter); result; result = iter.next()) {
278	float z;
279	z = zAxis.map(iter.getValue());
280	if (gluProject(1.0 + xLabelOfs, 0.0f, z,
281	mv, prjm, viewport,
282	&wx, &wy, &wz) &&
283	wz >= 0.0 && wz <= 1.0) {
284	char buff[20];
285	glLoadIdentity();
286	glTranslatef((int) wx, (int) viewport[3] - (int)wy, 0.0f);
287	sprintf(buff, "%.*g", NUMDIGITS, iter.getValue());
288	_font->draw(buff);
289	}
290	}
291	_font->end();
292	};
293
294	glPopMatrix();
295	glPopAttrib();
296	}
297
298	void Grid::setFont(Fonts *font)
299	{
300	_font = font;
301	}
302

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