1 #ifndef __APPLE__

2 #include <GL/gl.h>

3 #else

4 #include <OpenGL/gl.h>

5 #endif

6

7 #include "psys_impl.h"

8

9 void psys_gl_draw_start(struct psys_emitter *em, void *cls)

10 {

11 float xform[16];

12

13 glMatrixMode(GL_MODELVIEW);

14 glPushMatrix();

15

16 glGetFloatv(GL_MODELVIEW_MATRIX, xform);

17 xform[0] = xform[5] = xform[10] = 1.0;

18 xform[1] = xform[2] = xform[4] = xform[6] = xform[8] = xform[9] = 0.0;

19

20 glLoadMatrixf(xform);

21

22 glPushAttrib(GL_ENABLE_BIT);

23 glDisable(GL_LIGHTING);

24

25 glEnable(GL_BLEND);

26 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

27

28 if(em->tex) {

29 glEnable(GL_TEXTURE_2D);

30 glBindTexture(GL_TEXTURE_2D, em->tex);

31 }

32

33 glDepthMask(0);

34

35 glBegin(GL_QUADS);

36 glColor3f(1, 1, 1);

37 }

38

39 void psys_gl_draw(struct psys_emitter *em, struct psys_particle *p, void *cls)

40 {

41 float hsz = p->size / 2.0;

42

43 glTexCoord2f(0, 0);

44 glVertex3f(p->pos.x - hsz, p->pos.y - hsz, p->pos.z);

45

46 glTexCoord2f(1, 0);

47 glVertex3f(p->pos.x + hsz, p->pos.y - hsz, p->pos.z);

48

49 glTexCoord2f(1, 1);

50 glVertex3f(p->pos.x + hsz, p->pos.y + hsz, p->pos.z);

51

52 glTexCoord2f(0, 1);

53 glVertex3f(p->pos.x - hsz, p->pos.y + hsz, p->pos.z);

54 }

55

56 void psys_gl_draw_end(struct psys_emitter *em, void *cls)

57 {

58 glEnd();

59

60 glDepthMask(1);

61 glPopAttrib();

62

63 glMatrixMode(GL_MODELVIEW);

64 glPopMatrix();

65 }