[教程|Tutorial]3D世界中绘制纹理|World Draw Texture

Jerry小坏

[CN]
首先#include <com_model.h>，之后Hook HUD_DrawNormalTriangles函数，方法是在LoadClient里pExportFunc->HUD_DrawNormalTriangles = HUD_DrawNormalTriangles;

接下来一切都可以在HUD_DrawNormalTriangles函数里面进行了：
先用gEngfuncs.pfnSPR_Load读取一张纹理，然后gEngfuncs.GetSpritePointer获取纹理指针，写在一行就是：

1. model_t *MyTexture = (struct model_s *)gEngfuncs.GetSpritePointer( gEngfuncs.pfnSPR_Load( "sprites/320hud3.spr" ) );

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再接着就是用gEngfuncs.pTriAPI->SpriteTexture对纹理进行绑定然后设定一下渲染方案：


[EN]
Include com_model.h, and hook the function  HUD_DrawNormalTriangles when load client. (pExportFunc->HUD_DrawNormalTriangles = HUD_DrawNormalTriangles;)


Use gEngfuncs.pfnSPR_Load to load a texture, and use gEngfuncs.GetSpritePointer to get the pointer:

1. 
   
2. model_t *MyTexture = (struct model_s *)gEngfuncs.GetSpritePointer( gEngfuncs.pfnSPR_Load( "sprites/320hud3.spr" ) );
   

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Then use gEngfuncs.pTriAPI->SpriteTexture to bind the texture and set render solution:





[CN]
1.绘制出一个三角形
使用TRI_TRIANGLES来绘制三角形，使用TRI_QUADS来绘制四边形，使用TRI_QUAD_STRIP来连续绘制四边形从而拼出一个正方体。使用pTriAPI->Vertex3f指定出三个顶点坐标（直接使用世界坐标就行了），使用pTriAPI->TexCoord2f分配纹理


[EN]
1.Draw a Triangle
Use TRI_TRIANGLES to draw triangles, use TRI_QUADS to draw squares, use TRI_QUAD_STRIP to piece a cube. use pTriAPI->Vertex3f to point the vertexes(you can just write the world coordinates), use pTriAPI->TexCoord2f to set texture coordinates.





Preview:



2.绘制出一个正方形|Draw a Square:

Preview:



3.绘制出一个正方体|Draw a Cube:
顶点路径|Vertex Paths:

1. gEngfuncs.pTriAPI->Begin( TRI_QUAD_STRIP );// 绘制四边形带[]
   
2. // >> 正方体右面[]
   
3. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 1.0f );
   
4. gEngfuncs.pTriAPI->Vertex3f( 250.0f, 250.0f, -250.0f );
   
5. 
   
6. 
   
7. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 0.0f );
   
8. gEngfuncs.pTriAPI->Vertex3f( 250.0f, 250.0f, 250.0f );
   
9. 
   
10. 
    
11. gEngfuncs.pTriAPI->TexCoord2f( 1.0f, 1.0f );
    
12. gEngfuncs.pTriAPI->Vertex3f( 250.0f, -250.0f, -250.0f );
    
13. 
    
14. 
    
15. gEngfuncs.pTriAPI->TexCoord2f( 1.0f, 0.0f );
    
16. gEngfuncs.pTriAPI->Vertex3f( 250.0f, -250.0f, 250.0f );
    
17. 
    
18. // >> 正方体后面[]
    
19. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 1.0f );
    
20. gEngfuncs.pTriAPI->Vertex3f( -250.0f, -250.0f, -250.0f );
    
21. 
    
22. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 0.0f );
    
23. gEngfuncs.pTriAPI->Vertex3f( -250.0f, -250.0f, 250.0f );
    
24. gEngfuncs.pTriAPI->End();// 结束绘制[]
    
25. 
    
26. gEngfuncs.pTriAPI->Begin( TRI_QUAD_STRIP );// 绘制四边形带[]
    
27. // >> 正方体底面[]
    
28. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 1.0f );
    
29. gEngfuncs.pTriAPI->Vertex3f( 250.0f, 250.0f, -250.0f );
    
30. 
    
31. 
    
32. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 0.0f );
    
33. gEngfuncs.pTriAPI->Vertex3f( 250.0f, -250.0f, -250.0f );
    
34. 
    
35. 
    
36. gEngfuncs.pTriAPI->TexCoord2f( 1.0f, 1.0f );
    
37. gEngfuncs.pTriAPI->Vertex3f( -250.0f, 250.0f, -250.0f );
    
38. 
    
39. 
    
40. gEngfuncs.pTriAPI->TexCoord2f( 1.0f, 0.0f );
    
41. gEngfuncs.pTriAPI->Vertex3f( -250.0f, -250.0f, -250.0f );
    
42. 
    
43. // >> 正方体左面[]
    
44. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 1.0f );
    
45. gEngfuncs.pTriAPI->Vertex3f( -250.0f, 250.0f, 250.0f );
    
46. 
    
47. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 0.0f );
    
48. gEngfuncs.pTriAPI->Vertex3f( -250.0f, -250.0f, 250.0f );
    
49. gEngfuncs.pTriAPI->End();// 结束绘制[]
    
50. 
    
51. gEngfuncs.pTriAPI->Begin( TRI_QUAD_STRIP );// 绘制四边形带[]
    
52. // >> 正方体前面[]
    
53. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 1.0f );
    
54. gEngfuncs.pTriAPI->Vertex3f( 250.0f, 250.0f, -250.0f );
    
55. 
    
56. 
    
57. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 0.0f );
    
58. gEngfuncs.pTriAPI->Vertex3f( -250.0f, 250.0f, -250.0f );
    
59. 
    
60. 
    
61. gEngfuncs.pTriAPI->TexCoord2f( 1.0f, 1.0f );
    
62. gEngfuncs.pTriAPI->Vertex3f( 250.0f, 250.0f, 250.0f );
    
63. 
    
64. 
    
65. gEngfuncs.pTriAPI->TexCoord2f( 1.0f, 0.0f );
    
66. gEngfuncs.pTriAPI->Vertex3f( -250.0f, 250.0f, 250.0f );
    
67. 
    
68. // >> 正方体顶面[]
    
69. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 1.0f );
    
70. gEngfuncs.pTriAPI->Vertex3f( 250.0f, -250.0f, 250.0f );
    
71. 
    
72. gEngfuncs.pTriAPI->TexCoord2f( 0.0f, 0.0f );
    
73. gEngfuncs.pTriAPI->Vertex3f( -250.0f, -250.0f, 250.0f );
    
74. gEngfuncs.pTriAPI->End();// 结束绘制

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Preview: