1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2016 Blender Foundation.
* All rights reserved.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file arrow2d_manipulator.c
* \ingroup wm
*
* \name 2D Arrow Manipulator
*
* \brief Simple arrow manipulator which is dragged into a certain direction.
*/
#include "BIF_gl.h"
#include "BKE_context.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_rect.h"
#include "DNA_windowmanager_types.h"
#include "ED_screen.h"
#include "ED_manipulator_library.h"
#include "GPU_draw.h"
#include "GPU_immediate.h"
#include "GPU_matrix.h"
#include "MEM_guardedalloc.h"
#include "RNA_access.h"
#include "WM_types.h"
/* own includes */
#include "WM_api.h"
#include "manipulator_library_intern.h"
typedef struct ArrowManipulator2D {
struct wmManipulator manipulator;
float angle;
float line_len;
} ArrowManipulator2D;
static void arrow2d_draw_geom(ArrowManipulator2D *arrow, const float origin[2], const float color[4])
{
const float size = 0.11f;
const float size_h = size / 2.0f;
const float len = arrow->line_len;
const float draw_line_ofs = (arrow->manipulator.line_width * 0.5f) / arrow->manipulator.scale;
unsigned int pos = VertexFormat_add_attrib(immVertexFormat(), "pos", COMP_F32, 2, KEEP_FLOAT);
gpuPushMatrix();
gpuTranslate2fv(origin);
gpuScaleUniform(arrow->manipulator.scale);
gpuRotate2D(RAD2DEGF(arrow->angle));
/* local offset */
gpuTranslate2f(arrow->manipulator.offset[0] + draw_line_ofs, arrow->manipulator.offset[1]);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformColor4fv(color);
immBegin(PRIM_LINES, 2);
immVertex2f(pos, 0.0f, 0.0f);
immVertex2f(pos, 0.0f, len);
immEnd();
immBegin(PRIM_TRIANGLES, 3);
immVertex2f(pos, size_h, len);
immVertex2f(pos, -size_h, len);
immVertex2f(pos, 0.0f, len + size * 1.7f);
immEnd();
immUnbindProgram();
gpuPopMatrix();
}
static void manipulator_arrow2d_draw(const bContext *UNUSED(C), struct wmManipulator *mpr)
{
ArrowManipulator2D *arrow = (ArrowManipulator2D *)mpr;
float col[4];
manipulator_color_get(mpr, mpr->state & WM_MANIPULATOR_STATE_HIGHLIGHT, col);
glLineWidth(mpr->line_width);
glEnable(GL_BLEND);
arrow2d_draw_geom(arrow, mpr->origin, col);
glDisable(GL_BLEND);
if (mpr->interaction_data) {
ManipulatorInteraction *inter = arrow->manipulator.interaction_data;
glEnable(GL_BLEND);
arrow2d_draw_geom(arrow, inter->init_origin, (const float[4]){0.5f, 0.5f, 0.5f, 0.5f});
glDisable(GL_BLEND);
}
}
static void manipulator_arrow2d_invoke(
bContext *UNUSED(C), struct wmManipulator *mpr, const wmEvent *UNUSED(event))
{
ManipulatorInteraction *inter = MEM_callocN(sizeof(ManipulatorInteraction), __func__);
copy_v2_v2(inter->init_origin, mpr->origin);
mpr->interaction_data = inter;
}
static int manipulator_arrow2d_test_select(
bContext *UNUSED(C), struct wmManipulator *mpr, const wmEvent *event)
{
ArrowManipulator2D *arrow = (ArrowManipulator2D *)mpr;
const float mval[2] = {event->mval[0], event->mval[1]};
const float line_len = arrow->line_len * mpr->scale;
float mval_local[2];
copy_v2_v2(mval_local, mval);
sub_v2_v2(mval_local, mpr->origin);
float line[2][2];
line[0][0] = line[0][1] = line[1][0] = 0.0f;
line[1][1] = line_len;
/* rotate only if needed */
if (arrow->angle != 0.0f) {
float rot_point[2];
copy_v2_v2(rot_point, line[1]);
rotate_v2_v2fl(line[1], rot_point, arrow->angle);
}
/* arrow line intersection check */
float isect_1[2], isect_2[2];
const int isect = isect_line_sphere_v2(
line[0], line[1], mval_local, MANIPULATOR_HOTSPOT + mpr->line_width * 0.5f,
isect_1, isect_2);
if (isect > 0) {
float line_ext[2][2]; /* extended line for segment check including hotspot */
copy_v2_v2(line_ext[0], line[0]);
line_ext[1][0] = line[1][0] + MANIPULATOR_HOTSPOT * ((line[1][0] - line[0][0]) / line_len);
line_ext[1][1] = line[1][1] + MANIPULATOR_HOTSPOT * ((line[1][1] - line[0][1]) / line_len);
const float lambda_1 = line_point_factor_v2(isect_1, line_ext[0], line_ext[1]);
if (isect == 1) {
return IN_RANGE_INCL(lambda_1, 0.0f, 1.0f);
}
else {
BLI_assert(isect == 2);
const float lambda_2 = line_point_factor_v2(isect_2, line_ext[0], line_ext[1]);
return IN_RANGE_INCL(lambda_1, 0.0f, 1.0f) && IN_RANGE_INCL(lambda_2, 0.0f, 1.0f);
}
}
return 0;
}
/* -------------------------------------------------------------------- */
/** \name 2D Arrow Manipulator API
*
* \{ */
struct wmManipulator *ED_manipulator_arrow2d_new(wmManipulatorGroup *mgroup, const char *name)
{
ArrowManipulator2D *arrow = (ArrowManipulator2D *)WM_manipulator_new(
"MANIPULATOR_WT_arrow_2d", mgroup, name);
arrow->manipulator.flag |= WM_MANIPULATOR_DRAW_ACTIVE;
arrow->line_len = 1.0f;
return &arrow->manipulator;
}
void ED_manipulator_arrow2d_set_angle(struct wmManipulator *mpr, const float angle)
{
ArrowManipulator2D *arrow = (ArrowManipulator2D *)mpr;
arrow->angle = angle;
}
void ED_manipulator_arrow2d_set_line_len(struct wmManipulator *mpr, const float len)
{
ArrowManipulator2D *arrow = (ArrowManipulator2D *)mpr;
arrow->line_len = len;
}
static void MANIPULATOR_WT_arrow_2d(wmManipulatorType *wt)
{
/* identifiers */
wt->idname = "MANIPULATOR_WT_arrow_2d";
/* api callbacks */
wt->draw = manipulator_arrow2d_draw;
wt->invoke = manipulator_arrow2d_invoke;
wt->test_select = manipulator_arrow2d_test_select;
wt->struct_size = sizeof(ArrowManipulator2D);
}
void ED_manipulatortypes_arrow_2d(void)
{
WM_manipulatortype_append(MANIPULATOR_WT_arrow_2d);
}
/** \} */ /* Arrow Manipulator API */
|
