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OpenGL: draw NDOF guide with new immediate mode 

This is the rotation pivot guide for 3D mouse input.

Work toward T49043
This commit is contained in:
Mike Erwin 2016-08-16 21:54:50 -04:00
parent 6b34eed217
commit d8f036efd6
1 changed files with 29 additions and 23 deletions
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52
source/blender/editors/space_view3d/view3d_draw.c
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@ -750,7 +750,7 @@ static void draw_rotation_guide(RegionView3D *rv3d)
float o[3]; /* center of rotation */
float end[3]; /* endpoints for drawing */
float color[4] = {0.0f, 0.4235f, 1.0f, 1.0f}; /* bright blue so it matches device LEDs */
GLubyte color[4] = {0, 108, 255, 255}; /* bright blue so it matches device LEDs */
negate_v3_v3(o, rv3d->ofs);
@ -760,6 +760,12 @@ static void draw_rotation_guide(RegionView3D *rv3d)
glEnable(GL_POINT_SMOOTH);
glDepthMask(0); /* don't overwrite zbuf */
VertexFormat *format = immVertexFormat();
unsigned pos = add_attrib(format, "pos", GL_FLOAT, 3, KEEP_FLOAT);
unsigned col = add_attrib(format, "color", GL_UNSIGNED_BYTE, 4, NORMALIZE_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_3D_SMOOTH_COLOR);
if (rv3d->rot_angle != 0.0f) {
/* -- draw rotation axis -- */
float scaled_axis[3];
@ -767,26 +773,26 @@ static void draw_rotation_guide(RegionView3D *rv3d)
mul_v3_v3fl(scaled_axis, rv3d->rot_axis, scale);
glBegin(GL_LINE_STRIP);
color[3] = 0.0f; /* more transparent toward the ends */
glColor4fv(color);
immBegin(GL_LINE_STRIP, 3);
color[3] = 0; /* more transparent toward the ends */
immAttrib4ubv(col, color);
add_v3_v3v3(end, o, scaled_axis);
glVertex3fv(end);
immVertex3fv(pos, end);
#if 0
color[3] = 0.2f + fabsf(rv3d->rot_angle); /* modulate opacity with angle */
/* ^^ neat idea, but angle is frame-rate dependent, so it's usually close to 0.2 */
#endif
color[3] = 0.5f; /* more opaque toward the center */
glColor4fv(color);
glVertex3fv(o);
color[3] = 127; /* more opaque toward the center */
immAttrib4ubv(col, color);
immVertex3fv(pos, o);
color[3] = 0.0f;
glColor4fv(color);
color[3] = 0;
immAttrib4ubv(col, color);
sub_v3_v3v3(end, o, scaled_axis);
glVertex3fv(end);
glEnd();
immVertex3fv(pos, end);
immEnd();
/* -- draw ring around rotation center -- */
{
@ -808,9 +814,9 @@ static void draw_rotation_guide(RegionView3D *rv3d)
axis_angle_to_quat(q, vis_axis, vis_angle);
}
color[3] = 0.25f; /* somewhat faint */
glColor4fv(color);
glBegin(GL_LINE_LOOP);
immBegin(GL_LINE_LOOP, ROT_AXIS_DETAIL);
color[3] = 63; /* somewhat faint */
immAttrib4ubv(col, color);
for (i = 0, angle = 0.0f; i < ROT_AXIS_DETAIL; ++i, angle += step) {
float p[3] = {s * cosf(angle), s * sinf(angle), 0.0f};
@ -819,23 +825,23 @@ static void draw_rotation_guide(RegionView3D *rv3d)
}
add_v3_v3(p, o);
glVertex3fv(p);
immVertex3fv(pos, p);
}
glEnd();
immEnd();
#undef ROT_AXIS_DETAIL
}
color[3] = 1.0f; /* solid dot */
color[3] = 255; /* solid dot */
}
else
color[3] = 0.5f; /* see-through dot */
color[3] = 127; /* see-through dot */
/* -- draw rotation center -- */
glColor4fv(color);
glBegin(GL_POINTS);
glVertex3fv(o);
glEnd();
immBegin(GL_POINTS, 1);
immAttrib4ubv(col, color);
immVertex3fv(pos, o);
immEnd();
#if 0
/* find screen coordinates for rotation center, then draw pretty icon */