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778 lines
19 KiB
778 lines
19 KiB
/******************************Module*Header*******************************\
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* Module Name: glwindow.c
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*
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* OpenGL window maintenance.
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*
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* Created: 09-Mar-1995 15:10:10
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* Author: Gilman Wong [gilmanw]
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*
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* Copyright (c) 1995 Microsoft Corporation
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*
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\**************************************************************************/
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "global.h"
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#include "glwindow.h"
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#include "nff.h"
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#include "trackbal.h"
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// Move global stuff into SCENE struct.
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HGLRC ghrc = (HGLRC) 0;
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HPALETTE ghpalOld, ghPalette = (HPALETTE) 0;
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BOOL bUseStatic = FALSE;
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UINT uiSysPalUse = SYSPAL_STATIC;
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extern void DoGlStuff(HWND, HDC);
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extern HGLRC hrcInitGL(HWND, HDC);
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extern void stateInit(HWND, HDC);
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extern void vCleanupGL(HGLRC, HDC);
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extern BOOL bSetupPixelFormat(HDC);
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extern void CreateRGBPalette(HDC);
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extern VOID vSetSize(HWND);
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extern void ForceRedraw(HWND);
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extern SCENE *OpenScene(LPSTR lpstrFile);
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CHAR lpstrFile[256];
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// Global ambient lights.
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static GLfloat lightAmbient[4] = {0.4f, 0.4f, 0.4f, 1.0f};
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static GLfloat lightAmbientLow[4] = {0.2f, 0.2f, 0.2f, 1.0f};
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//!!!move to SCENE structure
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// Trackball stuff
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POINT gptWindow;
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SIZE gszWindow; // already in SCENE
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float curquat[4], lastquat[4];
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LONG glMouseDownX, glMouseDownY;
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BOOL gbLeftMouse = FALSE;
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BOOL gbSpinning = FALSE;
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float zoom = 1.0f;
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//!!!move to SCENE structure
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typedef enum enumPOLYDRAW {
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POLYDRAW_FILLED = 0,
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POLYDRAW_LINES = 1,
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POLYDRAW_POINTS = 2
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} POLYDRAW;
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typedef enum enumSHADE {
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SHADE_SMOOTH = 0,
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SHADE_FLAT = 1
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} SHADE;
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typedef enum enumLIGHT {
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LIGHT_OFF = 0,
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LIGHT_INFINITE = 1,
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LIGHT_LOCAL = 2
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} LIGHT;
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SHADE gShadeMode = SHADE_SMOOTH;
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POLYDRAW gPolyDrawMode = POLYDRAW_FILLED;
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LIGHT gLightMode = LIGHT_INFINITE;
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/******************************Public*Routine******************************\
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* MyCreateGLWindow
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*
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* Setup the windows.
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*
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* History:
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* 15-Dec-1994 -by- Gilman Wong [gilmanw]
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* Wrote it.
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\**************************************************************************/
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HWND MyCreateGLWindow(HINSTANCE hInstance, LPTSTR lpstr)
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{
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WNDCLASS wc;
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RECT rcl;
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HWND hwnd;
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lstrcpy(lpstrFile, lpstr);
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// Create the OpenGL window.
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wc.style = CS_OWNDC;
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wc.lpfnWndProc = GLWndProc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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wc.hInstance = hInstance;
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wc.hIcon = NULL;
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wc.hCursor = LoadCursor(NULL, IDC_ARROW);
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wc.hbrBackground = GetStockObject(WHITE_BRUSH);
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wc.lpszMenuName = NULL;
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wc.lpszClassName = "GLWClass";
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RegisterClass(&wc);
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hwnd = CreateWindow(
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"GLWClass",
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"OpenGL stuff",
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WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
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//CW_USEDEFAULT,
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//CW_USEDEFAULT,
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300,
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0,
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100,
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100,
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NULL,
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NULL,
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hInstance,
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NULL
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);
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//!!!hack -- not really the right coordinates
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gptWindow.x = 0;
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gptWindow.y = 300;
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gszWindow.cx = 100;
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gszWindow.cy = 100;
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if (hwnd)
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{
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ShowWindow(hwnd, SW_NORMAL);
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UpdateWindow(hwnd);
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}
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SetTimer(hwnd, 1, 1, NULL);
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return hwnd;
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}
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/******************************Public*Routine******************************\
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* GLWndProc
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*
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* WndProc for the OpenGL window.
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*
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* History:
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* 15-Dec-1994 -by- Gilman Wong [gilmanw]
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* Wrote it.
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\**************************************************************************/
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long FAR PASCAL GLWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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{
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long lRet = 0;
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RECT rcl;
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HDC hdc;
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PAINTSTRUCT ps;
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SCENE *scene;
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if (message != WM_CREATE)
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scene = (SCENE *) GetWindowLong(hwnd, GWL_USERDATA);
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// Process window message.
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switch (message)
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{
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case WM_CREATE:
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//LBprintf("WM_CREATE");
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if(hdc = GetDC(hwnd))
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{
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if (ghrc == (HGLRC) 0)
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ghrc = hrcInitGL(hwnd, hdc);
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scene = OpenScene(lpstrFile);
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if (scene)
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{
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SetWindowLong(hwnd, GWL_USERDATA, (LONG) scene);
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rcl.left = 0;
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rcl.top = 0;
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rcl.right = scene->szWindow.cx;
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rcl.bottom = scene->szWindow.cy;
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AdjustWindowRect(&rcl, WS_OVERLAPPEDWINDOW, 0);
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SetWindowPos(hwnd, NULL, 0, 0,
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rcl.right, rcl.bottom,
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SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOCOPYBITS);
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stateInit(hwnd, hdc);
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}
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else
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lRet = -1;
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ReleaseDC(hwnd,hdc);
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}
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break;
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case WM_MOVE:
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gptWindow.x = (int) LOWORD(lParam);
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gptWindow.y = (int) HIWORD(lParam);
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break;
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case WM_SIZE:
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gszWindow.cx = LOWORD(lParam);
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gszWindow.cy = HIWORD(lParam);
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scene->szWindow.cx = LOWORD(lParam);
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scene->szWindow.cy = HIWORD(lParam);
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vSetSize(hwnd);
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ForceRedraw(hwnd);
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break;
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case WM_PAINT:
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//LBprintf("WM_PAINT");
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hdc = BeginPaint( hwnd, &ps );
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DoGlStuff( hwnd, hdc );
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EndPaint( hwnd, &ps );
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break;
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case WM_PALETTECHANGED:
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//LBprintf("WM_PALETTECHANGED");
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if (hwnd != (HWND) wParam)
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{
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if (hdc = GetDC(hwnd))
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{
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UnrealizeObject(ghPalette);
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SelectPalette(hdc, ghPalette, TRUE);
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if (RealizePalette(hdc) != GDI_ERROR)
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lRet = 1;
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}
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}
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break;
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case WM_QUERYNEWPALETTE:
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//LBprintf("WM_QUERYNEWPALETTE");
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if (hdc = GetDC(hwnd))
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{
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UnrealizeObject(ghPalette);
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SelectPalette(hdc, ghPalette, FALSE);
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if (RealizePalette(hdc) != GDI_ERROR)
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lRet = 1;
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}
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break;
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case WM_KEYDOWN:
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switch (wParam)
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{
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case VK_ESCAPE: // <ESC> is quick exit
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PostMessage(hwnd, WM_DESTROY, 0, 0);
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break;
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case VK_UP:
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zoom *= .8f;
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if (zoom < 1.0f && zoom > .8f)
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zoom = 1.0f;
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LBprintf("Zoom = %f", zoom);
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vSetSize(hwnd);
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break;
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case VK_DOWN:
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zoom *= 1.25f;
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if (zoom > 1.0f && zoom < 1.25f)
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zoom = 1.0f;
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LBprintf("Zoom = %f", zoom);
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vSetSize(hwnd);
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break;
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default:
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break;
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}
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break;
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case WM_CHAR:
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switch(wParam)
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{
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case 's':
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case 'S':
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gShadeMode = (gShadeMode + 1) % 2;
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glShadeModel( gShadeMode == SHADE_FLAT ? GL_FLAT : GL_SMOOTH );
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LBprintf("glShadeModel(%s)", gShadeMode == SHADE_FLAT ? "GL_FLAT" :
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"GL_SMOOTH");
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break;
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case 'p':
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case 'P':
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gPolyDrawMode = (gPolyDrawMode + 1) % 3;
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switch (gPolyDrawMode)
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{
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case POLYDRAW_POINTS:
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glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
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break;
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case POLYDRAW_LINES:
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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break;
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case POLYDRAW_FILLED:
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default:
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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break;
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}
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LBprintf("glPolygonMode(%s)", gPolyDrawMode == POLYDRAW_POINTS ? "GL_POINT" :
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gPolyDrawMode == POLYDRAW_LINES ? "GL_LINE" :
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"GL_FILL");
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break;
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case 'l':
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case 'L':
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gLightMode = (gLightMode + 1) % 3;
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if ( gLightMode != LIGHT_OFF )
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{
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int i;
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glEnable(GL_NORMALIZE);
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glEnable(GL_LIGHTING);
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glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
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glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,
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gLightMode == LIGHT_LOCAL ? GL_TRUE : GL_FALSE);
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for (i = 0; i < scene->Lights.count; i++)
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{
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glCallList(scene->Lights.listBase + i);
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glEnable(GL_LIGHT0 + i);
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}
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/* If no other lights, turn on ambient on higher */
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if (!scene->Lights.count)
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &lightAmbient);
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else
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &lightAmbientLow);
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}
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else
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{
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glDisable(GL_NORMALIZE);
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glDisable(GL_LIGHTING);
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}
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LBprintf("Light = %s", gLightMode == LIGHT_OFF ? "disabled" :
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gLightMode == LIGHT_INFINITE ? "infinite" :
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"local");
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break;
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default:
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break;
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}
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ForceRedraw(hwnd);
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break;
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case WM_LBUTTONDOWN:
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SetCapture(hwnd);
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glMouseDownX = LOWORD(lParam);
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glMouseDownY = HIWORD(lParam);
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gbLeftMouse = TRUE;
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ForceRedraw(hwnd);
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break;
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case WM_LBUTTONUP:
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ReleaseCapture();
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gbLeftMouse = FALSE;
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ForceRedraw(hwnd);
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break;
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case WM_TIMER:
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hdc = GetDC(hwnd);
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DoGlStuff( hwnd, hdc );
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ReleaseDC(hwnd, hdc);
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break;
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case WM_DESTROY:
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KillTimer(hwnd, 1);
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hdc = GetDC(hwnd);
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vCleanupGL(ghrc, hdc);
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ReleaseDC(hwnd, hdc);
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PostQuitMessage( 0 );
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break;
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default:
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lRet = DefWindowProc(hwnd, message, wParam, lParam);
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break;
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}
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return lRet;
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}
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unsigned char threeto8[8] = {
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0, 0111>>1, 0222>>1, 0333>>1, 0444>>1, 0555>>1, 0666>>1, 0377
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};
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unsigned char twoto8[4] = {
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0, 0x55, 0xaa, 0xff
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};
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unsigned char oneto8[2] = {
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0, 255
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};
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unsigned char
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ComponentFromIndex(i, nbits, shift)
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{
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unsigned char val;
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val = i >> shift;
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switch (nbits) {
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case 1:
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val &= 0x1;
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return oneto8[val];
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case 2:
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val &= 0x3;
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return twoto8[val];
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case 3:
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val &= 0x7;
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return threeto8[val];
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default:
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return 0;
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}
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}
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void
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CreateRGBPalette(HDC hdc)
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{
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PIXELFORMATDESCRIPTOR pfd, *ppfd;
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LOGPALETTE *pPal;
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int n, i;
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ppfd = &pfd;
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n = GetPixelFormat(hdc);
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DescribePixelFormat(hdc, n, sizeof(PIXELFORMATDESCRIPTOR), ppfd);
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if (ppfd->dwFlags & PFD_NEED_PALETTE) {
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n = 1 << ppfd->cColorBits;
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pPal = (PLOGPALETTE)LocalAlloc(LMEM_FIXED, sizeof(LOGPALETTE) +
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n * sizeof(PALETTEENTRY));
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pPal->palVersion = 0x300;
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pPal->palNumEntries = n;
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for (i=0; i<n; i++) {
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pPal->palPalEntry[i].peRed =
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ComponentFromIndex(i, ppfd->cRedBits, ppfd->cRedShift);
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pPal->palPalEntry[i].peGreen =
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ComponentFromIndex(i, ppfd->cGreenBits, ppfd->cGreenShift);
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pPal->palPalEntry[i].peBlue =
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ComponentFromIndex(i, ppfd->cBlueBits, ppfd->cBlueShift);
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pPal->palPalEntry[i].peFlags = (i == 0 || i == 255) ? 0 : PC_NOCOLLAPSE;
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}
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ghPalette = CreatePalette(pPal);
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LocalFree(pPal);
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if (ppfd->dwFlags & PFD_NEED_SYSTEM_PALETTE)
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{
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uiSysPalUse = SetSystemPaletteUse(hdc, SYSPAL_NOSTATIC);
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bUseStatic = TRUE;
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}
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ghpalOld = SelectPalette(hdc, ghPalette, FALSE);
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n = RealizePalette(hdc);
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UnrealizeObject(ghPalette);
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n = RealizePalette(hdc);
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}
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}
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BOOL bSetupPixelFormat(HDC hdc)
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{
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PIXELFORMATDESCRIPTOR pfd, *ppfd;
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int pixelformat;
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ppfd = &pfd;
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memset(ppfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
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ppfd->nSize = sizeof(PIXELFORMATDESCRIPTOR);
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ppfd->nVersion = 1;
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ppfd->dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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ppfd->dwLayerMask = PFD_MAIN_PLANE;
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ppfd->iPixelType = PFD_TYPE_RGBA;
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ppfd->cColorBits = 24;
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ppfd->cDepthBits = 16;
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ppfd->cAccumBits = 0;
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ppfd->cStencilBits = 0;
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pixelformat = ChoosePixelFormat(hdc, ppfd);
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if ( (pixelformat = ChoosePixelFormat(hdc, ppfd)) == 0 )
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{
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MessageBox(NULL, "ChoosePixelFormat failed", "Error", MB_OK);
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return FALSE;
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}
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if (SetPixelFormat(hdc, pixelformat, ppfd) == FALSE)
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{
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MessageBox(NULL, "SetPixelFormat failed", "Error", MB_OK);
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return FALSE;
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}
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CreateRGBPalette(hdc);
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return TRUE;
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}
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HGLRC hrcInitGL(HWND hwnd, HDC hdc)
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{
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HGLRC hrc;
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/* Create a Rendering Context */
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bSetupPixelFormat( hdc );
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hrc = wglCreateContext( hdc );
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/* Make it Current */
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wglMakeCurrent( hdc, hrc );
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return hrc;
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}
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void stateInit(HWND hwnd, HDC hdc)
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{
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GLint i;
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SCENE *scene = (SCENE *) GetWindowLong(hwnd, GWL_USERDATA); //!!! pass instead
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glDrawBuffer(GL_BACK);
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/* Set the clear color */
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glClearColor( scene->rgbaClear.r, scene->rgbaClear.g,
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scene->rgbaClear.b, scene->rgbaClear.a );
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/* Turn on z-buffer */
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glEnable(GL_DEPTH_TEST);
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/* Turn on backface culling */
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glFrontFace(GL_CCW);
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//glEnable(GL_CULL_FACE);
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/* Shading */
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glShadeModel( gShadeMode == SHADE_FLAT ? GL_FLAT : GL_SMOOTH );
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/* Polygon draw mode */
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switch (gPolyDrawMode)
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{
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case POLYDRAW_POINTS:
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glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
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|
break;
|
|
case POLYDRAW_LINES:
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
|
|
break;
|
|
case POLYDRAW_FILLED:
|
|
default:
|
|
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
|
break;
|
|
}
|
|
|
|
/* Turn on the lights */
|
|
|
|
if ( gLightMode != LIGHT_OFF )
|
|
{
|
|
glEnable(GL_NORMALIZE);
|
|
glEnable(GL_LIGHTING);
|
|
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
|
|
glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER,
|
|
gLightMode == LIGHT_LOCAL ? GL_TRUE : GL_FALSE);
|
|
for (i = 0; i < scene->Lights.count; i++)
|
|
{
|
|
glCallList(scene->Lights.listBase + i);
|
|
glEnable(GL_LIGHT0 + i);
|
|
}
|
|
|
|
/* If no other lights, turn on ambient on higher */
|
|
|
|
if (!scene->Lights.count)
|
|
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &lightAmbient);
|
|
else
|
|
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &lightAmbientLow);
|
|
}
|
|
else
|
|
{
|
|
glDisable(GL_NORMALIZE);
|
|
glDisable(GL_LIGHTING);
|
|
}
|
|
|
|
/* Setup viewport */
|
|
|
|
vSetSize(hwnd);
|
|
|
|
/* Initialize trackball */
|
|
|
|
trackball(curquat, 0.0, 0.0, 0.0, 0.0);
|
|
}
|
|
|
|
VOID vSetSize(HWND hwnd)
|
|
{
|
|
SCENE *scene = (SCENE *) GetWindowLong(hwnd, GWL_USERDATA); //!!! pass instead
|
|
MyXYZ xyzZoomFrom;
|
|
GLfloat localPerspective = scene->AspectRatio;
|
|
|
|
/* Adjust aspect ratio to window size */
|
|
|
|
localPerspective *= ((GLfloat) scene->szWindow.cx / (GLfloat) scene->szWindow.cy);
|
|
|
|
/* Compute the vector from xyzAt to xyzFrom */
|
|
|
|
xyzZoomFrom.x = scene->xyzFrom.x - scene->xyzAt.x;
|
|
xyzZoomFrom.y = scene->xyzFrom.y - scene->xyzAt.y;
|
|
xyzZoomFrom.z = scene->xyzFrom.z - scene->xyzAt.z;
|
|
|
|
/* Scale by the zoom factor */
|
|
|
|
xyzZoomFrom.x *= zoom;
|
|
xyzZoomFrom.y *= zoom;
|
|
xyzZoomFrom.z *= zoom;
|
|
|
|
/* Compute new xyzFrom */
|
|
|
|
xyzZoomFrom.x += scene->xyzAt.x;
|
|
xyzZoomFrom.y += scene->xyzAt.y;
|
|
xyzZoomFrom.z += scene->xyzAt.x;
|
|
|
|
/* Set up viewport extents */
|
|
|
|
glViewport(0, 0, scene->szWindow.cx, scene->szWindow.cy);
|
|
|
|
/* Set up the projection matrix */
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
//gluPerspective(scene->ViewAngle, scene->AspectRatio,
|
|
// scene->Hither, scene->Yon);
|
|
gluPerspective(scene->ViewAngle, localPerspective,
|
|
scene->Hither, scene->Yon * zoom);
|
|
|
|
/* Set up the model matrix */
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
//gluLookAt(scene->xyzFrom.x,scene->xyzFrom.y,scene->xyzFrom.z,
|
|
// scene->xyzAt.x,scene->xyzAt.y,scene->xyzAt.z,
|
|
// scene->xyzUp.x,scene->xyzUp.y,scene->xyzUp.z);
|
|
gluLookAt(xyzZoomFrom.x,xyzZoomFrom.y,xyzZoomFrom.z,
|
|
scene->xyzAt.x,scene->xyzAt.y,scene->xyzAt.z,
|
|
scene->xyzUp.x,scene->xyzUp.y,scene->xyzUp.z);
|
|
}
|
|
|
|
void
|
|
vCleanupGL(HGLRC hrc, HDC hdc)
|
|
{
|
|
//if (ghPalette)
|
|
// DeleteObject(SelectObject(ghdcMem, ghpalOld));
|
|
|
|
/* Destroy our context */
|
|
|
|
wglDeleteContext( hrc );
|
|
|
|
if (bUseStatic)
|
|
SetSystemPaletteUse(hdc, uiSysPalUse);
|
|
}
|
|
|
|
void
|
|
ForceRedraw(HWND hwnd)
|
|
{
|
|
MSG msg;
|
|
|
|
if (!PeekMessage(&msg, hwnd, WM_PAINT, WM_PAINT, PM_NOREMOVE) )
|
|
{
|
|
InvalidateRect(hwnd, NULL, FALSE);
|
|
}
|
|
}
|
|
|
|
void
|
|
DoGlStuff( HWND hwnd, HDC hdc )
|
|
{
|
|
SCENE *scene = (SCENE *) GetWindowLong(hwnd, GWL_USERDATA); //!!! pass instead
|
|
USHORT usMouseCurX, usMouseCurY;
|
|
POINT pt;
|
|
float matRot[4][4];
|
|
|
|
if (gbLeftMouse)
|
|
{
|
|
if (GetCursorPos(&pt))
|
|
{
|
|
// Subtract current window origin to convert to window coordinates.
|
|
|
|
pt.x -= gptWindow.x;
|
|
pt.y -= gptWindow.y;
|
|
|
|
// If mouse has moved since button was pressed, change quaternion.
|
|
|
|
if (pt.x != glMouseDownX || pt.y != glMouseDownY)
|
|
{
|
|
//trackball(lastquat,
|
|
// 2.0*(gszWindow.cx-glMouseDownX)/gszWindow.cx-1.0,
|
|
// 2.0*glMouseDownY/gszWindow.cy-1.0,
|
|
// 2.0*(gszWindow.cx-pt.x)/gszWindow.cx-1.0,
|
|
// 2.0*pt.y/gszWindow.cy-1.0);
|
|
trackball(lastquat,
|
|
2.0*(glMouseDownX)/gszWindow.cx-1.0,
|
|
2.0*(gszWindow.cy-glMouseDownY)/gszWindow.cy-1.0,
|
|
2.0*(pt.x)/gszWindow.cx-1.0,
|
|
2.0*(gszWindow.cy-pt.y)/gszWindow.cy-1.0);
|
|
|
|
gbSpinning = TRUE;
|
|
}
|
|
else
|
|
gbSpinning = FALSE;
|
|
|
|
glMouseDownX = pt.x;
|
|
glMouseDownY = pt.y;
|
|
}
|
|
}
|
|
|
|
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
|
|
|
|
glPushMatrix();
|
|
|
|
if (gbSpinning)
|
|
add_quats(lastquat, curquat, curquat);
|
|
|
|
build_rotmatrix(matRot, curquat);
|
|
glMultMatrixf(&(matRot[0][0]));
|
|
|
|
if (scene->Objects.count)
|
|
{
|
|
//LBprintf("call display list");
|
|
|
|
glCallList(scene->Objects.listBase);
|
|
}
|
|
|
|
glPopMatrix();
|
|
|
|
SwapBuffers(hdc);
|
|
}
|
|
|
|
SCENE *OpenScene(LPSTR lpstrFile)
|
|
{
|
|
SCENE *scene = (SCENE *) NULL;
|
|
CHAR *pchExt;
|
|
|
|
// Find the extension.
|
|
|
|
pchExt = lpstrFile;
|
|
while ((*pchExt != '.') && (*pchExt != '\0'))
|
|
pchExt++;
|
|
|
|
if (*pchExt == '.')
|
|
{
|
|
// Use extension as the key to call appropriate parser.
|
|
|
|
if (!lstrcmpi(pchExt, ".nff"))
|
|
scene = NffOpenScene(lpstrFile);
|
|
else if (!lstrcmpi(pchExt, ".obj"))
|
|
scene = ObjOpenScene(lpstrFile);
|
|
else
|
|
LBprintf("Unknown extension: %s", pchExt);
|
|
}
|
|
|
|
return scene;
|
|
}
|