1 #include <assert.h>

2 #include "gfxutil.h"

3 #include "mesh.h"

4 #include "meshgen.h"

5 #include "texture.h"

6 #include "shader.h"

7 #include "sdrman.h"

8 #include "opengl.h"

9 #include "logger.h"

10

11 void draw_rect(const Vector3 &v1, const Vector3 &v2, Texture2D *tex, ShaderProg *sdr)

12 {

13 static ShaderProg *defsdr;

14

15 if(!defsdr) {

16 if(!(defsdr = get_sdrprog("defpost.v.glsl", "defpost.p.glsl"))) {

17 static bool didlog;

18 if(!didlog) {

19 error_log("draw_rect: failed to load default shader\n");

20 didlog = true;

21 }

22 if(!sdr) {

23 return;

24 }

25 }

26 }

27

28

29 if(tex) {

30 set_texture(tex);

31 }

32 if(sdr) {

33 sdr->bind();

34 } else {

35 defsdr->bind();

36

37 assert(defsdr->get_attrib_location("attr_vertex") == MESH_ATTR_VERTEX);

38 assert(defsdr->get_attrib_location("attr_texcoord") == MESH_ATTR_TEXCOORD);

39 }

40

41

42 float varr[] = {

43 v1.x, v1.y, v1.z, v2.x, v1.y, v2.z,

44 v2.x, v2.y, v2.z, v1.x, v2.y, v1.z

45 };

46 static const float tarr[] = { 0, 0, 1, 0, 1, 1, 0, 1 };

47 static const unsigned int idxarr[] = {0, 1, 2, 0, 2, 3};

48

49 // disable VBOs if they are enabled

50 glBindBuffer(GL_ARRAY_BUFFER, 0);

51 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

52

53 glEnableVertexAttribArray(MESH_ATTR_VERTEX);

54 glVertexAttribPointer(MESH_ATTR_VERTEX, 3, GL_FLOAT, GL_FALSE, 0, varr);

55 glEnableVertexAttribArray(MESH_ATTR_TEXCOORD);

56 glVertexAttribPointer(MESH_ATTR_TEXCOORD, 2, GL_FLOAT, GL_FALSE, 0, tarr);

57

58 glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, idxarr);

59

60 glDisableVertexAttribArray(MESH_ATTR_VERTEX);

61 glDisableVertexAttribArray(MESH_ATTR_TEXCOORD);

62

63 set_texture(0);

64 }