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util.c
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util.c
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#include "util.h"
void errorFatal(const char* message) {
perror(message);
exit(EXIT_FAILURE);
}
char* newString(const char* string) {
char* str = (char*) malloc((strlen(string)+1) * sizeof(char));
if (str == NULL)
errorFatal("String malloc...");
strcpy(str, string);
return str;
}
void deleteString(const char* string) {
free((void*)string);
}
void replaceString(const char* oldStr, const char* newStr) {
deleteString(oldStr);
oldStr = newString(newStr);
}
float toRad(float degrees) {
return degrees / (180.0 / M_PI);
}
float randFloat(float lowerBound, float upperBound) {
float number = (float)rand() / RAND_MAX;
return lowerBound + (number * (upperBound - lowerBound));
}
extern float calculateAspectRatio(int width, int height) {
if (height == 0)
height = 1;
return (float)width / height;
}
void testErrors(const char* infoString) {
GLuint errorNumber;
errorNumber = glGetError();
if (errorNumber != GL_NO_ERROR) {
const GLubyte* errorMessage = gluErrorString(errorNumber);
fprintf(stderr, "Error test for: [%s] -> (%u) %s\n", infoString, errorNumber, errorMessage);
//free((void*)errorMessage); // free string???
exit(EXIT_FAILURE);
}
}