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 using namespace goatgfx;

12

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

14 {

15 static ShaderProg *defsdr;

16

17 if(!defsdr) {

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

19 static bool didlog;

20 if(!didlog) {

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

22 didlog = true;

23 }

24 if(!sdr) {

25 return;

26 }

27 }

28 }

29

30

31 if(tex) {

32 set_texture(tex);

33 }

34 if(sdr) {

35 sdr->bind();

36 } else {

37 defsdr->bind();

38

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

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

41 }

42

43

44 float varr[] = {

45 v1.x, v1.y, v1.z, v2.x, v1.y, v2.z,

46 v2.x, v2.y, v2.z, v1.x, v2.y, v1.z

47 };

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

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

50

51 // disable VBOs if they are enabled

52 glBindBuffer(GL_ARRAY_BUFFER, 0);

53 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

54

55 glEnableVertexAttribArray(MESH_ATTR_VERTEX);

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

57 glEnableVertexAttribArray(MESH_ATTR_TEXCOORD);

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

59

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

61

62 glDisableVertexAttribArray(MESH_ATTR_VERTEX);

63 glDisableVertexAttribArray(MESH_ATTR_TEXCOORD);

64

65 set_texture(0);

66 }