libpsys
annotate src/psys_gl.c @ 0:1c8eb90a6989
initial commit
| author | John Tsiombikas <nuclear@mutantstargoat.com> |
|---|---|
| date | Sat, 24 Sep 2011 07:22:07 +0300 |
| parents | |
| children | 874a942853ad |
| rev | line source |
|---|---|
| nuclear@0 | 1 #ifndef __APPLE__ |
| nuclear@0 | 2 #include <GL/gl.h> |
| nuclear@0 | 3 #else |
| nuclear@0 | 4 #include <OpenGL/gl.h> |
| nuclear@0 | 5 #endif |
| nuclear@0 | 6 |
| nuclear@0 | 7 #include "psys_impl.h" |
| nuclear@0 | 8 |
| nuclear@0 | 9 void psys_gl_draw_start(struct psys_emitter *em, void *cls) |
| nuclear@0 | 10 { |
| nuclear@0 | 11 float xform[16]; |
| nuclear@0 | 12 |
| nuclear@0 | 13 glMatrixMode(GL_MODELVIEW); |
| nuclear@0 | 14 glPushMatrix(); |
| nuclear@0 | 15 |
| nuclear@0 | 16 glGetFloatv(GL_MODELVIEW_MATRIX, xform); |
| nuclear@0 | 17 xform[3] = xform[7] = xform[11] = xform[12] = xform[13] = xform[14] = 0.0f; |
| nuclear@0 | 18 xform[15] = 1.0f; |
| nuclear@0 | 19 |
| nuclear@0 | 20 glLoadMatrixf(xform); |
| nuclear@0 | 21 |
| nuclear@0 | 22 glPushAttrib(GL_ENABLE_BIT); |
| nuclear@0 | 23 glDisable(GL_LIGHTING); |
| nuclear@0 | 24 |
| nuclear@0 | 25 glDepthMask(0); |
| nuclear@0 | 26 |
| nuclear@0 | 27 glBegin(GL_QUADS); |
| nuclear@0 | 28 glColor3f(1, 1, 1); |
| nuclear@0 | 29 } |
| nuclear@0 | 30 |
| nuclear@0 | 31 void psys_gl_draw(struct psys_emitter *em, struct psys_particle *p, void *cls) |
| nuclear@0 | 32 { |
| nuclear@0 | 33 float hsz = p->size / 2.0; |
| nuclear@0 | 34 |
| nuclear@0 | 35 glTexCoord2f(0, 0); |
| nuclear@0 | 36 glVertex3f(p->pos.x - hsz, p->pos.y - hsz, p->pos.z); |
| nuclear@0 | 37 |
| nuclear@0 | 38 glTexCoord2f(1, 0); |
| nuclear@0 | 39 glVertex3f(p->pos.x + hsz, p->pos.y - hsz, p->pos.z); |
| nuclear@0 | 40 |
| nuclear@0 | 41 glTexCoord2f(1, 1); |
| nuclear@0 | 42 glVertex3f(p->pos.x + hsz, p->pos.y + hsz, p->pos.z); |
| nuclear@0 | 43 |
| nuclear@0 | 44 glTexCoord2f(0, 1); |
| nuclear@0 | 45 glVertex3f(p->pos.x - hsz, p->pos.y + hsz, p->pos.z); |
| nuclear@0 | 46 } |
| nuclear@0 | 47 |
| nuclear@0 | 48 void psys_gl_draw_end(struct psys_emitter *em, void *cls) |
| nuclear@0 | 49 { |
| nuclear@0 | 50 glEnd(); |
| nuclear@0 | 51 |
| nuclear@0 | 52 glDepthMask(1); |
| nuclear@0 | 53 glPopAttrib(); |
| nuclear@0 | 54 |
| nuclear@0 | 55 glMatrixMode(GL_MODELVIEW); |
| nuclear@0 | 56 glPopMatrix(); |
| nuclear@0 | 57 } |