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December 13, 2019 02:14
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Computer Graphics - Moving in 3D space using OpenGL
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#include "ColorAdapter.h" | |
RGB ColorAdapter::HexToRGB(int color) { | |
int Red = ((color & 0xFF0000) >> 16); | |
int Green = ((color & 0x00FF00) >> 8); | |
int Blue = color & 0x0000FF; | |
RGB Result; | |
Result.Red = Red; | |
Result.Green = Green; | |
Result.Blue = Blue; | |
return Result; | |
} | |
RGBSmall ColorAdapter::HexToSmallRGB(int color) { | |
int Red = ((color & 0xFF0000) >> 16); | |
int Green = ((color & 0x00FF00) >> 8); | |
int Blue = color & 0x0000FF; | |
RGBSmall Result; | |
Result.Red = (float)Red / 255; | |
Result.Green = (float)Green / 255; | |
Result.Blue = (float)Blue / 255; | |
return Result; | |
} | |
int ColorAdapter::RGBToHex(int red, int green, int blue) { | |
int color = 0x00; | |
color = color | red; | |
color = color << 8; | |
color = color | green; | |
color = color << 8; | |
color = color | blue; | |
return color; | |
} | |
int ColorAdapter::RGBToHex(RGB RGBColor) { | |
int color = 0x00; | |
color = color | RGBColor.Red; | |
color = color << 8; | |
color = color | RGBColor.Green; | |
color = color << 8; | |
color = color | RGBColor.Blue; | |
return color; | |
} | |
RGBSmall ColorAdapter::RGBToSmall(int red, int green, int blue) { | |
RGBSmall Result; | |
Result.Red = (float)red / 255; | |
Result.Green = (float)green / 255; | |
Result.Blue = (float)blue / 255; | |
return Result; | |
} | |
RGBSmall ColorAdapter::RGBToSmall(RGB Color) { | |
RGBSmall Result; | |
Result.Red = (float)Color.Red / 255; | |
Result.Green = (float)Color.Green / 255; | |
Result.Blue = (float)Color.Blue / 255; | |
return Result; | |
} |
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#ifndef __COLOR_ADAPTER_H__ | |
#define __COLOR_ADAPTER_H__ | |
#include "RGB.h" | |
#include "RGBSmall.h" | |
class ColorAdapter { | |
public: | |
static const int ALICE_BLUE = 0xF0F8FF; | |
static const int ANTIQUE_WHITE = 0xFAEBD7; | |
static const int AQUA = 0x00FFFF; | |
static const int AQUAMARINE = 0x7FFFD4; | |
static const int AZURE = 0xF0FFFF; | |
static const int BEIGE = 0xF5F5DC; | |
static const int BISQUE = 0xFFE4C4; | |
static const int BLACK = 0x000000; | |
static const int BLANCHED_ALMOND = 0xFFEBCD; | |
static const int BLUE = 0x0000FF; | |
static const int BLUE_VIOLET = 0x8A2BE2; | |
static const int BROWN = 0xA52A2A; | |
static const int BURLY_WOOD = 0xDEB887; | |
static const int CADET_BLUE = 0x5F9EA0; | |
static const int CHARTREUSE = 0x7FFF00; | |
static const int CHOCOLATE = 0xD2691E; | |
static const int CORAL = 0xFF7F50; | |
static const int CORNFLOWER_BLUE = 0x6495ED; | |
static const int CORNSILK = 0xFFF8DC; | |
static const int CRIMSON = 0xDC143C; | |
static const int CYAN = 0x00FFFF; | |
static const int DARK_BLUE = 0x00008B; | |
static const int DARK_CYAN = 0x008B8B; | |
static const int DARK_GOLDEN_ROD = 0xB8860B; | |
static const int DARK_GRAY = 0xA9A9A9; | |
static const int DARK_GREY = 0xA9A9A9; | |
static const int DARK_GREEN = 0x006400; | |
static const int DARK_KHAKI = 0xBDB76B; | |
static const int DARK_MAGENTA = 0x8B008B; | |
static const int DARK_OLIVE_GREEN = 0x556B2F; | |
static const int DARK_ORANGE = 0xFF8C00; | |
static const int DARK_ORCHID = 0x9932CC; | |
static const int DARK_RED = 0x8B0000; | |
static const int DARK_SALMON = 0xE9967A; | |
static const int DARK_SEA_GREEN = 0x8FBC8F; | |
static const int DARK_SLATE_BLUE = 0x483D8B; | |
static const int DARK_SLATE_GRAY = 0x2F4F4F; | |
static const int DARK_SLATE_GREY = 0x2F4F4F; | |
static const int DARK_TURQUOISE = 0x00CED1; | |
static const int DARK_VIOLET = 0x9400D3; | |
static const int DEEP_PINK = 0xFF1493; | |
static const int DEEP_SKY_BLUE = 0x00BFFFF; | |
static const int DIM_GRAY = 0x696969; | |
static const int DIM_GREY = 0x696969; | |
static const int DODGER_BLUE = 0x1E90FF; | |
static const int FIRE_BRICK = 0xB22222; | |
static const int FLORAL_WHITE = 0xFFFAF0; | |
static const int FOREST_GREEN = 0x228B22; | |
static const int FUCHSIA = 0xFF00FF; | |
static const int GAINSBORO = 0xDCDCDC; | |
static const int GHOST_WHITE = 0xF8F8FF; | |
static const int GOLD = 0xFFD700; | |
static const int GOLDEN_ROD = 0xDAA520; | |
static const int GRAY = 0x808080; | |
static const int GREY = 0x808080; | |
static const int GREEN = 0x008000; | |
static const int GREEN_YELLOW = 0xADFF2F; | |
static const int HONEY_DEW = 0xF0FFF0; | |
static const int HOT_PINK = 0xFF69B4; | |
static const int INDIAN_RED = 0xCD5C5C; | |
static const int INDIGO = 0x4B0082; | |
static const int IVORY = 0xFFFFF0; | |
static const int KHAKI = 0xF0E68C; | |
static const int LAVENDER = 0xE6E6FA; | |
static const int LAVENDER_BLUSH = 0xFFF0F5; | |
static const int LAWN_GREEN = 0x7CFC00; | |
static const int LEMON_CHIFFON = 0xFFFACD; | |
static const int LIGHT_BLUE = 0xADD8E6; | |
static const int LIGHT_CORAL = 0xF08080; | |
static const int LIGHT_CYAN = 0xE0FFFF; | |
static const int LIGHT_GOLDEN_ROD_YELLOW = 0xFAFAD2; | |
static const int LIGHT_GRAY = 0xD3D3D3; | |
static const int LIGHT_GREY = 0xD3D3D3; | |
static const int LIGHT_GREEN = 0x90EE90; | |
static const int LIGHT_PINK = 0xFFB6C1; | |
static const int LIGHT_SALMON = 0xFFA07A; | |
static const int LIGHT_SEA_GREEN = 0x20B2AA; | |
static const int LIGHT_SKY_BLUE = 0x87CEFA; | |
static const int LIGHT_SLATE_GRAY = 0x778899; | |
static const int LIGHT_SLATE_GREY = 0x778899; | |
static const int LIGHT_STEEL_BLU = 0xB0C4DE; | |
static const int LIGHT_YELLOW = 0xFFFFE0; | |
static const int LIME = 0x00FF00; | |
static const int LIME_GREEN = 0x32CD32; | |
static const int LINEN = 0xFAF0E6; | |
static const int MAGENTA = 0xFF00FF; | |
static const int MAROON = 0x800000; | |
static const int MEDIUM_AQUA_MARINE = 0x66CDAA; | |
static const int MEDIUM_BLUE = 0x0000CD; | |
static const int MEDIUM_ORCHID = 0xBA55D3; | |
static const int MEDIUM_PURPLE = 0x9370DB; | |
static const int MEDIUM_SEA_GREEN = 0x3CB371; | |
static const int MEDIUM_SLATE_BLUE = 0x7B68EE; | |
static const int MEDIUM_SPRING_GREEN = 0x00FA9A; | |
static const int MEDIUM_TURQUOISE = 0x48D1CC; | |
static const int MEDIUM_VIOLET_RED = 0xC71585; | |
static const int MIDNIGHT_BLUE = 0x191970; | |
static const int MINT_CREAM = 0xF5FFFA; | |
static const int MISTY_ROSE = 0xFFE4E1; | |
static const int MOCCASIN = 0xFFE4B5; | |
static const int NAVAJO_WHITE = 0xFFDEAD; | |
static const int NAVY = 0x000080; | |
static const int OLD_LACE = 0xFDF5E6; | |
static const int OLIVE = 0x808000; | |
static const int OLIVE_DRAB = 0x6B8E23; | |
static const int ORANGE = 0xFFA500; | |
static const int ORANGE_RED = 0xFF4500; | |
static const int ORCHID = 0xDA70D6; | |
static const int PALE_GOLDEN_ROD = 0xEEE8AA; | |
static const int PALE_GREEN = 0x98FB98; | |
static const int PALE_TURQUOISE = 0xAFEEEE; | |
static const int PALE_VIOLET_RED = 0xDB7093; | |
static const int PAPAYA_WHIP = 0xFFEFD5; | |
static const int PEACH_PUFF = 0xFFDAB9; | |
static const int PERU = 0xCD853F; | |
static const int PINK = 0xFFC0CB; | |
static const int PLUM = 0xDDA0DD; | |
static const int POWDER_BLUE = 0xB0E0E6; | |
static const int PURPLE = 0x800080; | |
static const int REBECCA_PURPLE = 0x663399; | |
static const int RED = 0xFF0000; | |
static const int ROSY_BROWN = 0xBC8F8F; | |
static const int ROYAL_BLUE = 0x4169E1; | |
static const int SADDLE_BROWN = 0x8B4513; | |
static const int SALMON = 0xFA8072; | |
static const int SANDY_BROWN = 0xF4A460; | |
static const int SEA_GREEN = 0x2E8B57; | |
static const int SEA_SHELL = 0xFFF5EE; | |
static const int SIENNA = 0xA0522D; | |
static const int SILVER = 0xC0C0C0; | |
static const int SKY_BLUE = 0x87CEEB; | |
static const int SLATE_BLUE = 0x6A5ACD; | |
static const int SLATE_GRAY = 0x708090; | |
static const int SLATE_GREY = 0x708090; | |
static const int SNOW = 0xFFFAFA; | |
static const int SPRING_GREEN = 0x00FF7F; | |
static const int STEEL_BLUE = 0x4682B4; | |
static const int TAN = 0xD2B48C; | |
static const int TEAL = 0x008080; | |
static const int THISTLE = 0xD8BFD8; | |
static const int TOMATO = 0xFF6347; | |
static const int TURQUOISE = 0x40E0D0; | |
static const int VIOLET = 0xEE82EE; | |
static const int WHEAT = 0xF5DEB3; | |
static const int WHITE = 0xFFFFFF; | |
static const int WHITE_SMOKE = 0xF5F5F5; | |
static const int YELLOW = 0xFFFF00; | |
static const int YELLOW_GREEN = 0x9ACD32; | |
static RGB HexToRGB(int); | |
static RGBSmall HexToSmallRGB(int); | |
static int RGBToHex(int, int, int); | |
static int RGBToHex(RGB); | |
static RGBSmall RGBToSmall(int, int, int); | |
static RGBSmall RGBToSmall(RGB); | |
}; | |
#endif |
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#ifndef __RGB_H__ | |
#define __RGB_H__ | |
struct RGB { | |
short int Red; | |
short int Green; | |
short int Blue; | |
}; | |
#endif |
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#ifndef __RGB_SMALL_H__ | |
#define __RGB_SMALL_H__ | |
struct RGBSmall { | |
float Red; | |
float Green; | |
float Blue; | |
}; | |
#endif |
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#define _CRT_SECURE_NO_WARNINGS | |
#include <windows.h> // Header File For Windows | |
#include <gl\gl.h> // Header File For The OpenGL32 Library | |
#include <gl\glu.h> // Header File For The GLu32 Library | |
//#include <gl\glaux.h> // Header File For The GLaux Library | |
#include <cmath> | |
#include <cstdlib> | |
#include <ctime> | |
#include <vector> | |
#include <string> | |
#include "ColorAdapter.h" | |
# define PI 3.14159265358979323846 | |
#pragma comment(lib, "opengl32.lib") | |
#pragma comment(lib, "glu32.lib") | |
HGLRC hRC = NULL; // Permanent Rendering Context | |
HDC hDC = NULL; // Private GDI Device Context | |
HWND hWnd = NULL; // Holds Our Window Handle | |
HINSTANCE hInstance; // Holds The Instance Of The Application | |
bool keys[256]; // Array Used For The Keyboard Routine | |
bool active = TRUE; // Window Active Flag Set To TRUE By Default | |
bool fullscreen = FALSE; // Fullscreen Flag Set To Fullscreen Mode By Default | |
float X = 0, Y = 0.3, Z = 0; | |
float theta = 0, angle = 0; | |
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration For WndProc | |
GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize And Initialize The GL Window | |
{ | |
if (height == 0) // Prevent A Divide By Zero By | |
{ | |
height = 1; // Making Height Equal One | |
} | |
glViewport(0, 0, width, height); // Reset The Current Viewport | |
glMatrixMode(GL_PROJECTION); // Select The Projection Matrix | |
glLoadIdentity(); // Reset The Projection Matrix | |
// Calculate The Aspect Ratio Of The Window | |
gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f); | |
glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix | |
glLoadIdentity(); // Reset The Modelview Matrix | |
} | |
int InitGL() // All Setup For OpenGL Goes Here | |
{ | |
glShadeModel(GL_SMOOTH); // Enables Smooth Shading | |
glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background | |
glClearDepth(1.0f); // Depth Buffer Setup | |
glEnable(GL_DEPTH_TEST); // Enables Depth Testing | |
glDepthFunc(GL_LEQUAL); // The Type Of Depth Test To Do | |
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations | |
return TRUE; // Initialization Went OK | |
} | |
void DrawCube(int top, int bottom, int left, int right, int front, int back) { | |
glPushMatrix(); | |
RGBSmall Result; | |
// Top | |
Result = ColorAdapter::HexToSmallRGB(top); | |
glBegin(GL_QUADS); | |
glColor3d(Result.Red, Result.Green, Result.Blue); | |
glVertex3d(-1, 1, 1); | |
glVertex3d(-1, 1, -1); | |
glVertex3d(1, 1, -1); | |
glVertex3d(1, 1, 1); | |
glEnd(); | |
// Bottom | |
Result = ColorAdapter::HexToSmallRGB(bottom); | |
glBegin(GL_QUADS); | |
glColor3d(Result.Red, Result.Green, Result.Blue); | |
glVertex3d(-1, -1, 1); | |
glVertex3d(-1, -1, -1); | |
glVertex3d(1, -1, -1); | |
glVertex3d(1, -1, 1); | |
glEnd(); | |
// Left | |
Result = ColorAdapter::HexToSmallRGB(left); | |
glBegin(GL_QUADS); | |
glColor3d(Result.Red, Result.Green, Result.Blue); | |
glVertex3d(-1, -1, 1); | |
glVertex3d(-1, -1, -1); | |
glVertex3d(-1, 1, -1); | |
glVertex3d(-1, 1, 1); | |
glEnd(); | |
// Right | |
Result = ColorAdapter::HexToSmallRGB(right); | |
glBegin(GL_QUADS); | |
glColor3d(Result.Red, Result.Green, Result.Blue); | |
glVertex3d(1, -1, 1); | |
glVertex3d(1, -1, -1); | |
glVertex3d(1, 1, -1); | |
glVertex3d(1, 1, 1); | |
glEnd(); | |
// Front | |
Result = ColorAdapter::HexToSmallRGB(front); | |
glBegin(GL_QUADS); | |
glColor3d(Result.Red, Result.Green, Result.Blue); | |
glVertex3d(-1, -1, 1); | |
glVertex3d(1, -1, 1); | |
glVertex3d(1, 1, 1); | |
glVertex3d(-1, 1, 1); | |
glEnd(); | |
// Back | |
Result = ColorAdapter::HexToSmallRGB(back); | |
glBegin(GL_QUADS); | |
glColor3d(Result.Red, Result.Green, Result.Blue); | |
glVertex3d(-1, -1, -1); | |
glVertex3d(1, -1, -1); | |
glVertex3d(1, 1, -1); | |
glVertex3d(-1, 1, -1); | |
glEnd(); | |
glPopMatrix(); | |
} | |
int DrawGLScene() // Here's Where We Do All The Drawing | |
{ | |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer | |
glLoadIdentity(); // Reset The Current Modelview Matrix | |
gluLookAt(X, Y, Z, X + cos(theta), Y + sin(angle), Z + sin(theta), 0, 1, 0); | |
glPushMatrix(); | |
glTranslated(-4, 0, 0); | |
DrawCube( ColorAdapter::DARK_ORANGE, | |
ColorAdapter::DARK_ORCHID, | |
ColorAdapter::DARK_TURQUOISE, | |
ColorAdapter::RED, | |
ColorAdapter::SPRING_GREEN, | |
ColorAdapter::DEEP_PINK); | |
glPopMatrix(); | |
glPushMatrix(); | |
glTranslated(4, 0, 0); | |
DrawCube( ColorAdapter::DARK_ORANGE, | |
ColorAdapter::DARK_ORCHID, | |
ColorAdapter::DARK_TURQUOISE, | |
ColorAdapter::RED, | |
ColorAdapter::SPRING_GREEN, | |
ColorAdapter::DEEP_PINK); | |
glPopMatrix(); | |
return TRUE; // Everything Went OK | |
} | |
GLvoid KillGLWindow() // Properly Kill The Window | |
{ | |
if (fullscreen) // Are We In Fullscreen Mode? | |
{ | |
ChangeDisplaySettings(NULL, 0); // If So Switch Back To The Desktop | |
ShowCursor(TRUE); // Show Mouse Pointer | |
} | |
if (hRC) // Do We Have A Rendering Context? | |
{ | |
if (!wglMakeCurrent(NULL, NULL)) // Are We Able To Release The DC And RC Contexts? | |
{ | |
MessageBox(NULL, "Release Of DC And RC Failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); | |
} | |
if (!wglDeleteContext(hRC)) // Are We Able To Delete The RC? | |
{ | |
MessageBox(NULL, "Release Rendering Context Failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); | |
} | |
hRC = NULL; // Set RC To NULL | |
} | |
if (hDC && !ReleaseDC(hWnd, hDC)) // Are We Able To Release The DC | |
{ | |
MessageBox(NULL, "Release Device Context Failed.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); | |
hDC = NULL; // Set DC To NULL | |
} | |
if (hWnd && !DestroyWindow(hWnd)) // Are We Able To Destroy The Window? | |
{ | |
MessageBox(NULL, "Could Not Release hWnd.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); | |
hWnd = NULL; // Set hWnd To NULL | |
} | |
if (!UnregisterClass("OpenGL", hInstance)) // Are We Able To Unregister Class | |
{ | |
MessageBox(NULL, "Could Not Unregister Class.", "SHUTDOWN ERROR", MB_OK | MB_ICONINFORMATION); | |
hInstance = NULL; // Set hInstance To NULL | |
} | |
} | |
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag) | |
{ | |
GLuint PixelFormat; // Holds The Results After Searching For A Match | |
WNDCLASS wc; // Windows Class Structure | |
DWORD dwExStyle; // Window Extended Style | |
DWORD dwStyle; // Window Style | |
RECT WindowRect; // Grabs Rectangle Upper Left / Lower Right Values | |
WindowRect.left = (long)0; // Set Left Value To 0 | |
WindowRect.right = (long)width; // Set Right Value To Requested Width | |
WindowRect.top = (long)0; // Set Top Value To 0 | |
WindowRect.bottom = (long)height; // Set Bottom Value To Requested Height | |
fullscreen = fullscreenflag; // Set The Global Fullscreen Flag | |
hInstance = GetModuleHandle(NULL); // Grab An Instance For Our Window | |
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw On Move, And Own DC For Window | |
wc.lpfnWndProc = (WNDPROC)WndProc; // WndProc Handles Messages | |
wc.cbClsExtra = 0; // No Extra Window Data | |
wc.cbWndExtra = 0; // No Extra Window Data | |
wc.hInstance = hInstance; // Set The Instance | |
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load The Default Icon | |
wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load The Arrow Pointer | |
wc.hbrBackground = NULL; // No Background Required For GL | |
wc.lpszMenuName = NULL; // We Don't Want A Menu | |
wc.lpszClassName = "OpenGL"; // Set The Class Name | |
if (!RegisterClass(&wc)) // Attempt To Register The Window Class | |
{ | |
MessageBox(NULL, "Failed To Register The Window Class.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Exit And Return FALSE | |
} | |
if (fullscreen) // Attempt Fullscreen Mode? | |
{ | |
DEVMODE dmScreenSettings; // Device Mode | |
memset(&dmScreenSettings, 0, sizeof(dmScreenSettings)); // Makes Sure Memory's Cleared | |
dmScreenSettings.dmSize = sizeof(dmScreenSettings); // Size Of The Devmode Structure | |
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width | |
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height | |
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel | |
dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT; | |
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar. | |
if (ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL) | |
{ | |
// If The Mode Fails, Offer Two Options. Quit Or Run In A Window. | |
if (MessageBox(NULL, "The Requested Fullscreen Mode Is Not Supported By\nYour Video Card. Use Windowed Mode Instead?", "NeHe GL", MB_YESNO | MB_ICONEXCLAMATION) == IDYES) | |
{ | |
fullscreen = FALSE; // Select Windowed Mode (Fullscreen=FALSE) | |
} | |
else | |
{ | |
// Pop Up A Message Box Letting User Know The Program Is Closing. | |
MessageBox(NULL, "Program Will Now Close.", "ERROR", MB_OK | MB_ICONSTOP); | |
return FALSE; // Exit And Return FALSE | |
} | |
} | |
} | |
if (fullscreen) // Are We Still In Fullscreen Mode? | |
{ | |
dwExStyle = WS_EX_APPWINDOW; // Window Extended Style | |
dwStyle = WS_POPUP; // Windows Style | |
ShowCursor(FALSE); // Hide Mouse Pointer | |
} | |
else | |
{ | |
dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE; // Window Extended Style | |
dwStyle = WS_OVERLAPPEDWINDOW; // Windows Style | |
} | |
AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle); // Adjust Window To True Requested Size | |
if (!(hWnd = CreateWindowEx(dwExStyle, // Extended Style For The Window | |
"OpenGL", // Class Name | |
title, // Window Title | |
WS_CLIPSIBLINGS | // Required Window Style | |
WS_CLIPCHILDREN | // Required Window Style | |
dwStyle, // Selected Window Style | |
0, 0, // Window Position | |
WindowRect.right - WindowRect.left, // Calculate Adjusted Window Width | |
WindowRect.bottom - WindowRect.top, // Calculate Adjusted Window Height | |
NULL, // No Parent Window | |
NULL, // No Menu | |
hInstance, // Instance | |
NULL))) // Don't Pass Anything To WM_CREATE | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Window Creation Error.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
static PIXELFORMATDESCRIPTOR pfd = // pfd Tells Windows How We Want Things To Be | |
{ | |
sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor | |
1, // Version Number | |
PFD_DRAW_TO_WINDOW | // Format Must Support Window | |
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL | |
PFD_DOUBLEBUFFER, // Must Support Double Buffering | |
PFD_TYPE_RGBA, // Request An RGBA Format | |
bits, // Select Our Color Depth | |
0, 0, 0, 0, 0, 0, // Color Bits Ignored | |
0, // No Alpha Buffer | |
0, // Shift Bit Ignored | |
0, // No Accumulation Buffer | |
0, 0, 0, 0, // Accumulation Bits Ignored | |
16, // 16Bit Z-Buffer (Depth Buffer) | |
0, // No Stencil Buffer | |
0, // No Auxiliary Buffer | |
PFD_MAIN_PLANE, // Main Drawing Layer | |
0, // Reserved | |
0, 0, 0 // Layer Masks Ignored | |
}; | |
if (!(hDC = GetDC(hWnd))) // Did We Get A Device Context? | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Can't Create A GL Device Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
if (!(PixelFormat = ChoosePixelFormat(hDC, &pfd))) // Did Windows Find A Matching Pixel Format? | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Can't Find A Suitable PixelFormat.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
if (!SetPixelFormat(hDC, PixelFormat, &pfd)) // Are We Able To Set The Pixel Format? | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Can't Set The PixelFormat.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
if (!(hRC = wglCreateContext(hDC))) // Are We Able To Get A Rendering Context? | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Can't Create A GL Rendering Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
if (!wglMakeCurrent(hDC, hRC)) // Try To Activate The Rendering Context | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Can't Activate The GL Rendering Context.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
ShowWindow(hWnd, SW_SHOW); // Show The Window | |
SetForegroundWindow(hWnd); // Slightly Higher Priority | |
SetFocus(hWnd); // Sets Keyboard Focus To The Window | |
ReSizeGLScene(width, height); // Set Up Our Perspective GL Screen | |
if (!InitGL()) // Initialize Our Newly Created GL Window | |
{ | |
KillGLWindow(); // Reset The Display | |
MessageBox(NULL, "Initialization Failed.", "ERROR", MB_OK | MB_ICONEXCLAMATION); | |
return FALSE; // Return FALSE | |
} | |
return TRUE; // Success | |
} | |
LRESULT CALLBACK WndProc(HWND hWnd, // Handle For This Window | |
UINT uMsg, // Message For This Window | |
WPARAM wParam, // Additional Message Information | |
LPARAM lParam) // Additional Message Information | |
{ | |
switch (uMsg) // Check For Windows Messages | |
{ | |
case WM_ACTIVATE: // Watch For Window Activate Message | |
{ | |
if (!HIWORD(wParam)) // Check Minimization State | |
{ | |
active = TRUE; // Program Is Active | |
} | |
else | |
{ | |
active = FALSE; // Program Is No Longer Active | |
} | |
return 0; // Return To The Message Loop | |
} | |
case WM_SYSCOMMAND: // Intercept System Commands | |
{ | |
switch (wParam) // Check System Calls | |
{ | |
case SC_SCREENSAVE: // Screensaver Trying To Start? | |
case SC_MONITORPOWER: // Monitor Trying To Enter Powersave? | |
return 0; // Prevent From Happening | |
} | |
break; // Exit | |
} | |
case WM_CLOSE: // Did We Receive A Close Message? | |
{ | |
PostQuitMessage(0); // Send A Quit Message | |
return 0; // Jump Back | |
} | |
case WM_KEYDOWN: // Is A Key Being Held Down? | |
{ | |
keys[wParam] = TRUE; // If So, Mark It As TRUE | |
return 0; // Jump Back | |
} | |
case WM_KEYUP: // Has A Key Been Released? | |
{ | |
keys[wParam] = FALSE; // If So, Mark It As FALSE | |
return 0; // Jump Back | |
} | |
case WM_SIZE: // Resize The OpenGL Window | |
{ | |
ReSizeGLScene(LOWORD(lParam), HIWORD(lParam)); // LoWord=Width, HiWord=Height | |
return 0; // Jump Back | |
} | |
} | |
// Pass All Unhandled Messages To DefWindowProc | |
return DefWindowProc(hWnd, uMsg, wParam, lParam); | |
} | |
int WINAPI WinMain(HINSTANCE hInstance, // Instance | |
HINSTANCE hPrevInstance, // Previous Instance | |
LPSTR lpCmdLine, // Command Line Parameters | |
int nCmdShow) // Window Show State | |
{ | |
MSG msg; // Windows Message Structure | |
BOOL done = FALSE; // Bool Variable To Exit Loop | |
/* | |
// Ask The User Which Screen Mode They Prefer | |
if (MessageBox(NULL, "Would You Like To Run In Fullscreen Mode?", "Start FullScreen?", MB_YESNO | MB_ICONQUESTION) == IDNO) | |
{ | |
fullscreen = FALSE; // Windowed Mode | |
} | |
*/ | |
// Create Our OpenGL Window | |
if (!CreateGLWindow("NeHe's OpenGL Framework", 640, 480, 16, fullscreen)) | |
{ | |
return 0; // Quit If Window Was Not Created | |
} | |
while (!done) // Loop That Runs Until done=TRUE | |
{ | |
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) // Is There A Message Waiting? | |
{ | |
if (msg.message == WM_QUIT) // Have We Received A Quit Message? | |
{ | |
done = TRUE; // If So done=TRUE | |
} | |
else // If Not, Deal With Window Messages | |
{ | |
TranslateMessage(&msg); // Translate The Message | |
DispatchMessage(&msg); // Dispatch The Message | |
} | |
} | |
else // If There Are No Messages | |
{ | |
// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene() | |
if (active) // Program Active? | |
{ | |
if (keys[VK_ESCAPE]) // Was ESC Pressed? | |
{ | |
done = TRUE; // ESC Signalled A Quit | |
} | |
else // Not Time To Quit, Update Screen | |
{ | |
DrawGLScene(); // Draw The Scene | |
SwapBuffers(hDC); // Swap Buffers (Double Buffering) | |
} | |
} | |
if (keys['Q']) { | |
keys['Q'] = false; | |
theta -= 0.1; | |
} | |
if (keys['E']) { | |
keys['E'] = false; | |
theta += 0.1; | |
} | |
if (keys['W']) { | |
keys['W'] = false; | |
X += 0.2 * cos(theta); | |
Y += 0.2 * sin(angle); | |
Z += 0.2 * sin(theta); | |
} | |
if (keys['S']) { | |
keys['S'] = false; | |
X -= 0.2 * cos(theta); | |
Y -= 0.2 * sin(angle); | |
Z -= 0.2 * sin(theta); | |
} | |
if (keys['A']) { | |
keys['A'] = false; | |
X += 0.1 * sin(theta); | |
Z -= 0.1 * cos(theta); | |
} | |
if (keys['D']) { | |
keys['D'] = false; | |
X -= 0.1 * sin(theta); | |
Z += 0.1 * cos(theta); | |
} | |
if (keys[VK_UP]) { | |
keys[VK_UP] = false; | |
angle += 0.1; | |
if (angle > PI / 2) { | |
angle = PI / 2; | |
} | |
} | |
if (keys[VK_DOWN]) { | |
keys[VK_DOWN] = false; | |
angle -= 0.1; | |
if (angle < -PI / 2) { | |
angle = -PI / 2; | |
} | |
} | |
if (keys[VK_F2]) { | |
keys[VK_F2] = false; | |
char* message = "Coordinates:\nX: %f\nY: %f\nZ: %f\nAngle between X-Axis and Z-Axis: %f\nAngle between X-Axis and Y-Axis: %f"; | |
char buffer[256]; | |
sprintf(buffer, message, X, Y, Z, theta * 180 / PI, angle * 180 / PI); | |
MessageBox(NULL, buffer, "Coordinates", 0x00000000L); | |
} | |
if (keys[VK_F1]) // Is F1 Being Pressed? | |
{ | |
keys[VK_F1] = FALSE; // If So Make Key FALSE | |
KillGLWindow(); // Kill Our Current Window | |
fullscreen = !fullscreen; // Toggle Fullscreen / Windowed Mode | |
// Recreate Our OpenGL Window | |
if (!CreateGLWindow("NeHe's OpenGL Framework", 640, 480, 16, fullscreen)) | |
{ | |
return 0; // Quit If Window Was Not Created | |
} | |
} | |
} | |
} | |
// Shutdown | |
KillGLWindow(); // Kill The Window | |
return (msg.wParam); // Exit The Program | |
} |
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