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nuclear@4
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1 #include <stdio.h>
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nuclear@4
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2 #include "opengl.h"
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3 #include "xfer_view.h"
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4 #include "dicomview.h"
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5
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nuclear@6
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6 static TransferFunc *xfer;
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7
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8 static int act_color = 3;
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9
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10 bool xfview_init(TransferFunc *xferarg)
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11 {
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12 xfer = xferarg;
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13 return true;
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14 }
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15
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16 void xfview_destroy()
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17 {
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18 }
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19
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20 void xfview_draw()
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21 {
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22 float line_color[][3] = {
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23 { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 }, { 1, 1, 1 }
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24 };
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25
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26 glMatrixMode(GL_PROJECTION);
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27 glLoadIdentity();
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28 glMatrixMode(GL_MODELVIEW);
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29 glLoadIdentity();
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30
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31 int xsz, ysz;
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32 get_window_size(&xsz, &ysz);
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33 int nsamples = xsz / 4;
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34
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35 // paint the background a faint version of the selected color
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36 glBegin(GL_QUADS);
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37 glColor3f(line_color[act_color][0] * 0.1, line_color[act_color][1] * 0.1, line_color[act_color][2] * 0.1);
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38 glVertex2f(-1, -1);
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39 glVertex2f(1, -1);
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40 glVertex2f(1, 1);
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41 glVertex2f(-1, 1);
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42 glEnd();
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43
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44 glEnable(GL_LINE_SMOOTH);
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45
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46 glEnable(GL_BLEND);
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47 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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48
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49 // draw curve
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50 glLineWidth(2.0);
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51
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52 for(int i=0; i<3; i++) {
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53 int idx;
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54 if(act_color < 3) {
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55 idx = (i + act_color + 1) % 3;
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56 } else {
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57 idx = i;
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58 }
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59
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60 glColor3fv(line_color[idx]);
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61
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62 glBegin(GL_LINE_STRIP);
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63 for(int j=0; j<nsamples; j++) {
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64 float t = (float)j / (float)(nsamples - 1);
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nuclear@6
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65 float vval[4];
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66 xfer->map(t, vval);
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67
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68 glVertex2f(t * 2.0 - 1.0, vval[i] * 2.0 - 1.0);
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69 }
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70 glEnd();
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71 }
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72
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73 glDisable(GL_BLEND);
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74 }
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75
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76 void xfview_button(int bn, int press, int x, int y)
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77 {
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78 if(bn == 2 && press) {
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79 act_color = (act_color + 1) % 4;
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80 redisplay();
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81 return;
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82 }
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83
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nuclear@5
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84 if(bn == 1) {
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nuclear@5
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85 if(press) {
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nuclear@5
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86 } else {
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87 }
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88 }
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89 }
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90
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91 void xfview_motion(int x, int y)
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92 {
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93 }
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