1 #include <stdio.h>

2 #include <assert.h>

3 #include <assimp/material.h>

4 #include "opengl.h"

5 #include "material.h"

6

7 extern bool ass_obj_hack;

8

9 Material::Material()

10 : kd(1.0, 1.0, 1.0), ks(0.0, 0.0, 0.0)

11 {

12 shin = 1.0;

13 memset(tex, 0, sizeof tex);

14 }

15

16 void Material::load(const aiMaterial *assmat, TextureSet *texset)

17 {

18 aiColor4D col;

19 float val;

20

21 aiGetMaterialColor(assmat, AI_MATKEY_COLOR_DIFFUSE, &col);

22 kd = Color(col[0], col[1], col[2]);

23 aiGetMaterialColor(assmat, AI_MATKEY_COLOR_SPECULAR, &col);

24 ks = Color(col[0], col[1], col[2]);

25

26 unsigned int sz = 1;

27 val = 60.0;

28 aiGetMaterialFloatArray(assmat, AI_MATKEY_SHININESS, &val, &sz);

29 if(ass_obj_hack) {

30 val /= 4.0;

31 }

32 shin = val > 127 ? 127 : val;

33

34 sz = 1;

35 val = 1.0;

36 aiGetMaterialFloatArray(assmat, AI_MATKEY_SHININESS_STRENGTH, &val, &sz);

37 ks *= val;

38

39 // must match TEXTYPE enum in material.h

40 unsigned int asstypes[][2] = {

41 {aiTextureType_DIFFUSE, 0},

42 {aiTextureType_NORMALS, aiTextureType_HEIGHT},

43 {aiTextureType_SPECULAR, 0}

44 };

45

46 for(int i=0; i<NUM_TEXTURE_TYPES; i++) {

47 for(int j=0; j<2; j++) {

48 aiString tex_name;

49 if(asstypes[i][j] > 0 && aiGetMaterialString(assmat, AI_MATKEY_TEXTURE(asstypes[i][j], 0), &tex_name) == 0) {

50 tex[i] = texset->get_texture(tex_name.data);

51 break;

52 } else {

53 tex[i] = 0;

54 }

55 }

56 }

57 }

58

59 void Material::setup() const

60 {

61 float dcol[] = {kd.x, kd.y, kd.z, 1.0};

62 float scol[] = {ks.x, ks.y, ks.z, 1.0};

63

64 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, dcol);

65 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, scol);

66 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin);

67

68 if(tex[TEXTYPE_DIFFUSE]) {

69 glActiveTextureARB(GL_TEXTURE0);

70 glBindTexture(GL_TEXTURE_2D, tex[TEXTYPE_DIFFUSE]);

71 glEnable(GL_TEXTURE_2D);

72 } else {

73 glActiveTextureARB(GL_TEXTURE0);

74 glDisable(GL_TEXTURE_2D);

75 }

76

77 if(tex[TEXTYPE_NORMAL]) {

78 glActiveTextureARB(GL_TEXTURE1);

79 glBindTexture(GL_TEXTURE_2D, tex[TEXTYPE_NORMAL]);

80 glEnable(GL_TEXTURE_2D);

81 } else {

82 glActiveTextureARB(GL_TEXTURE1);

83 glDisable(GL_TEXTURE_2D);

84 }

85

86 glActiveTextureARB(GL_TEXTURE0);

87 }