Fixup not worked shader

Makefile

@@ -2,8 +2,8 @@ CC=gcc
 CFLAGS=-O1 -DDEBUG -g -ggdb -std=c23
 LIBS=`pkg-config sdl3 --cflags --libs` -lGL -lGLEW -lm
 
-HEADER = opengl.h readfile.h
-OBJ = main.o opengl.o readfile.o
+HEADER = readfile.h math.h opengl.h
+OBJ = main.o readfile.o math.o opengl.o
 
 all: mobiground
 

main.c

@@ -27,37 +27,6 @@ static void SetTitle ( SDL_Window *window )
     SDL_SetWindowTitle(window, title);
 }
 
-float toRad ( float deg )
-{
-    /* 180 deg = pi */
-    /* "deg" deg = x */
-    return deg * 3.141593f / 180.0f;
-}
-
-void resizeWindow ( int width, int height )
-{
-    shaderProgram_t sp;
-    float n = 1.0f; // near
-    float f = 3.0f; // far
-    float fov = toRad(90); // 90 or 65 for console
-    float aspect = width / (float) height;
-    float t = n * tanf (fov / 2.0f);
-    float r = t * aspect;
-
-    float projMatr[] = {
-        n/r, 0,   0,              0,
-        0,   n/t, 0,              0,
-        0,   0,   (f+n)/(n-f),   -1,
-        0,   0,   2.0f*n*f/(n-f), 0
-    }; // it's not rows, it's columns, 'GL_FALSE'
-    SDL_LogVerbose(SDL_LOG_CATEGORY_RENDER, "n=%.1f f=%.1f fov=%.2f aspect=%.2f t=%.2f r=%.2f\n", n, f, fov, aspect, t, r);
-    glUseProgram(sp.program);
-    glUniformMatrix4fv(sp.projMatrLoc, 1, GL_FALSE, projMatr);
-    glUseProgram(0);
-    glViewport(0, 0, (GLsizei)width, (GLsizei)height);
-}
-
-
 int main( int argc, char* argv[] )
 {
     _glWindows_t glW;

math.c

@@ -0,0 +1,6 @@
+float toRad ( float deg )
+{
+    /* 180 deg = pi */
+    /* "deg" deg = x */
+    return deg * 3.141593f / 180.0f;
+}

math.h

@@ -0,0 +1,6 @@
+#ifndef MATH_H
+#define MATH_H
+
+float toRad ( float deg );
+
+#endif // MATH_H

opengl.c

@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include <math.h>
 
 #include <GL/glew.h>
 #include <SDL3/SDL.h>
@@ -6,9 +7,32 @@
 
 #include "opengl.h"
 #include "readfile.h"
+#include "math.h"
 
 shaderProgram_t sp;
 
+void resizeWindow ( int width, int height )
+{
+    float n = 1.0f; // near
+    float f = 3.0f; // far
+    float fov = toRad(90); // 90 or 65 for console
+    float aspect = width / (float) height;
+    float t = n * tanf (fov / 2.0f);
+    float r = t * aspect;
+
+    float projMatr[] = {
+        n/r, 0,   0,              0,
+        0,   n/t, 0,              0,
+        0,   0,   (f+n)/(n-f),   -1,
+        0,   0,   2.0f*n*f/(n-f), 0
+    }; // it's not rows, it's columns, 'GL_FALSE'
+    SDL_LogVerbose(SDL_LOG_CATEGORY_RENDER, "n=%.1f f=%.1f fov=%.2f aspect=%.2f t=%.2f r=%.2f\n", n, f, fov, aspect, t, r);
+    glUseProgram(sp.program);
+    glUniformMatrix4fv(sp.projMatrLoc, 1, GL_FALSE, projMatr);
+    glUseProgram(0);
+    glViewport(0, 0, (GLsizei)width, (GLsizei)height);
+}
+
 GLuint createShader ( const char *shaderFile, GLenum shaderType )
 {
     const char *strShaderType;

opengl.h

@@ -15,6 +15,7 @@ typedef struct {
 
 GLuint createShader ( const char *shaderFile, GLenum shaderType );
 void createProgram ( GLuint *shaders, int len );
+void resizeWindow ( int width, int height );
 void createBuffer ( void );
 void startShaderProg ( void );
 void _GLBuffer( void );