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Posted By

Desoxena on 06/07/11


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text opengl texture


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Make a texture plate from a text file

 / Published in: C++
 

simple openGL script that makes a texture plate out of a text file.

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  1. #include <string>
  2. #include <fstream>
  3. #include <cmath>
  4. #include <Windows.h>
  5. #include <glut.h>
  6. #include <GL\GLU.h>
  7.  
  8. using namespace std;
  9.  
  10. const int dimensions = 14;
  11. int texture[10][dimensions*2][dimensions*2];
  12. char Ctexture[dimensions][dimensions];
  13. float R[] = {0, 1, 0, 1, 1, 0, .5, 1, .9, .5}; //black, white, blue, red, yellow, green, purple, pink, orange, gray
  14. float G[] = {0, 1, 0, 0, 1, 1,  0, 0, .5, .5}; //  0      1      2    3     4       5      6      7      8       9
  15. float B[] = {0, 1, 1, 0, 0, 0, .5, .8, 0, .5};
  16. float plateSize = 1;
  17.  
  18.  
  19. void load_plate(const char *_filename, int ID){
  20. 	ifstream myFile;
  21. 	myFile.open(_filename);
  22. 	string fileLine[dimensions]; 
  23. 	int i = 0;
  24. 	while(myFile.good()){
  25. 		getline(myFile, fileLine[i]);
  26. 		i++;
  27. 	}
  28. 	for (int a = 0; a < dimensions; a++) {	
  29. 		int e = 0;
  30. 		for (int b = 0; b < dimensions*2-1; b+=2) {
  31. 			Ctexture[a][e] = fileLine[a].at(b);
  32. 			e++;
  33. 		}
  34. 	}
  35. 	for (int a = 0; a < dimensions; a++) {
  36. 		for (int b = 0; b < dimensions; b++) {
  37. 			if      (Ctexture[a][b] == '0')   { texture[ID][a][b] = 0;}
  38. 			else if (Ctexture[a][b] == '1')   { texture[ID][a][b] = 1;}
  39. 			else if (Ctexture[a][b] == '2')   { texture[ID][a][b] = 2;}
  40. 			else if (Ctexture[a][b] == '3')   { texture[ID][a][b] = 3;}
  41. 			else if (Ctexture[a][b] == '4')   { texture[ID][a][b] = 4;}
  42. 			else if (Ctexture[a][b] == '5')   { texture[ID][a][b] = 5;}
  43. 			else if (Ctexture[a][b] == '6')   { texture[ID][a][b] = 6;}
  44. 			else if (Ctexture[a][b] == '7')   { texture[ID][a][b] = 7;}
  45. 			else if (Ctexture[a][b] == '8')   { texture[ID][a][b] = 8;}
  46. 			else if (Ctexture[a][b] == '9')   { texture[ID][a][b] = 9;}
  47. 		}
  48. 	}
  49. 	myFile.close();
  50. }
  51. void drawSquare(float x, float y, float z) {
  52. 	glPushMatrix();
  53. 	glBegin(GL_QUADS);
  54. 	glVertex3f(x, y, z);
  55. 	glVertex3f(x, y+plateSize/dimensions, z);
  56. 	glVertex3f(x+plateSize/dimensions, y+plateSize/dimensions, z);
  57. 	glVertex3f(x+plateSize/dimensions, y, z);
  58. 	glEnd();
  59. 	glPopMatrix();
  60. }
  61. void Reshape(int height, int width) {
  62. 	glClearColor(0, 0, 0, 1);
  63. 	glMatrixMode(GL_PROJECTION);
  64. 	glLoadIdentity();
  65. 	gluPerspective(60, (float)height/(float)width, 1, 100);
  66. 	glMatrixMode(GL_MODELVIEW);
  67. }
  68. void drawPlate(float x, float y, float z, int ID) {	
  69. 	for (int i = 0; i < dimensions; i++) {
  70. 		for (int j = 0; j < dimensions; j++) {
  71. 			glColor3d(R[texture[ID][i][j]], G[texture[ID][i][j]], B[texture[ID][i][j]]);
  72. 			drawSquare(x+(j*(plateSize/dimensions)), y+(i*(plateSize/dimensions)), z);
  73. 		}
  74. 	}
  75. }
  76. void Display(void){
  77. 	glClear(GL_COLOR_BUFFER_BIT);
  78. 	load_plate("texture1.txt", 1);
  79. 	drawPlate(0, 0, -4, 1);
  80. 	glutSwapBuffers();
  81. }
  82. void Keyboard(unsigned char key, int x, int y) {
  83. 	switch(key){
  84. 		case'a':
  85. 			plateSize += .05;
  86. 			glutPostRedisplay();
  87. 		break;
  88. 		case's':
  89. 			plateSize -= .05;
  90. 			glutPostRedisplay();
  91. 		break;
  92. 	}
  93. }
  94. int main(int argc, char **argv){
  95. 	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
  96. 	glutInit(&argc, argv);
  97. 	glutInitWindowSize(500, 500);
  98. 	glutInitWindowPosition(100, 100);
  99. 	glutCreateWindow("Texture plate tests");
  100. 	glutReshapeFunc(Reshape);
  101. 	glutDisplayFunc(Display);
  102. 	glutKeyboardFunc(Keyboard);
  103. 	glutMainLoop();
  104. }
  105.  
  106.  
  107.  
  108.  
  109. texture1.txt
  110. --------------------
  111. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  112. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  113. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  114. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  115. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  116. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  117. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  118. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  119. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  120. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  121. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  122. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  123. 1 1 1 1 1 1 1 1 1 1 1 1 1 1
  124. 1 1 1 1 1 1 1 1 1 1 1 1 1 1

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