summaryrefslogtreecommitdiff
path: root/win/Terrwnd.cpp
blob: e6f1a7a92b9ba7d8ee8aaa4344bd9a9b3659758c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
// TerrWnd.cpp : implementation file
//

#include "stdafx.h"
#include "LeoCAD.h"
#include "TerrWnd.h"
#include "Terrain.h"

#include "camera.h"
#include "Tools.h"
#include "Matrix.h"
#include "Vector.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CTerrainWnd

CTerrainWnd::CTerrainWnd(Terrain* pTerrain)
{
	m_pCamera = new Camera(20,20,20,0,0,0, NULL);
	m_pTerrain = pTerrain;
	m_pPalette = NULL;
	m_pDC = NULL;
	m_hglRC = 0;
	m_nAction = TERRAIN_ZOOM;
}

CTerrainWnd::~CTerrainWnd()
{
	delete m_pCamera;
}


BEGIN_MESSAGE_MAP(CTerrainWnd, CWnd)
	//{{AFX_MSG_MAP(CTerrainWnd)
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	ON_WM_SIZE()
	ON_WM_DESTROY()
	ON_WM_CREATE()
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_WM_SETCURSOR()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CTerrainWnd message handlers

BOOL CTerrainWnd::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

void CTerrainWnd::OnPaint() 
{
	CPaintDC dc(this); // device context for painting

	HDC oldDC = pfnwglGetCurrentDC();
	HGLRC oldRC = pfnwglGetCurrentContext();

	if (m_pPalette)
	{
		m_pDC->SelectPalette(m_pPalette, FALSE);
		m_pDC->RealizePalette();
	}

	pfnwglMakeCurrent(m_pDC->m_hDC, m_hglRC);

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	float aspect = (float)m_szView.cx/(float)m_szView.cy;
	glViewport(0, 0, m_szView.cx, m_szView.cy);

	m_pCamera->LoadProjection(aspect);

	m_pTerrain->Render(m_pCamera, aspect);

  glFlush();
	OpenGLSwapBuffers (dc.m_hDC);
	pfnwglMakeCurrent (oldDC, oldRC);
}

void CTerrainWnd::OnSize(UINT nType, int cx, int cy) 
{
	CWnd::OnSize(nType, cx, cy);
	
	if (cy < 1) cy = 1;
	m_szView.cx = cx;
	m_szView.cy = cy;
}

void CTerrainWnd::OnDestroy() 
{
	if (m_pPalette)
	{
		CClientDC dc(this);
	    CPalette palDefault;
		palDefault.CreateStockObject(DEFAULT_PALETTE);
		dc.SelectPalette(&palDefault, FALSE);
		delete m_pPalette;
	}

	if (m_hglRC)
		pfnwglDeleteContext(m_hglRC);
	if (m_pDC)
		delete m_pDC;

	CWnd::OnDestroy();
}

int CTerrainWnd::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
    m_pDC = new CClientDC(this);
    ASSERT(m_pDC != NULL);

	// Fill in the Pixel Format Descriptor
	PIXELFORMATDESCRIPTOR pfd;
	memset(&pfd,0, sizeof(PIXELFORMATDESCRIPTOR));
		
	pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);	
	pfd.nVersion = 1;
	pfd.dwFlags  =	PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER;
	pfd.iPixelType = PFD_TYPE_RGBA;
	pfd.cColorBits = 24;
	pfd.cDepthBits = 32;
	pfd.iLayerType = PFD_MAIN_PLANE;
		
	int nPixelFormat = OpenGLChoosePixelFormat(m_pDC->m_hDC, &pfd);
	if (nPixelFormat == 0)
		return -1;

	if (!OpenGLSetPixelFormat(m_pDC->m_hDC, nPixelFormat, &pfd))
		return -1;

	m_pPalette = new CPalette;
	if (CreateRGBPalette(m_pDC->m_hDC, &m_pPalette))
	{
		m_pDC->SelectPalette(m_pPalette, FALSE);
		m_pDC->RealizePalette();
	}
	else
	{
		delete m_pPalette;
		m_pPalette = NULL;
	}
		
	// Create a rendering context.
	m_hglRC = pfnwglCreateContext(m_pDC->m_hDC);
	if (!m_hglRC)
		return -1;

	HDC oldDC = pfnwglGetCurrentDC();
	HGLRC oldRC = pfnwglGetCurrentContext();
	pfnwglMakeCurrent (m_pDC->m_hDC, m_hglRC);

	// Initialize OpenGL the way we want it.
	float ambient [] = {0.0f, 0.0f, 0.0f, 1.0f};
	float diffuse [] = {0.8f, 0.9f, 0.6f, 1.0f};
	float specular[] = {0.0f, 0.0f, 0.0f, 1.0f};
	float position[] = {0.0f, 5.0f,15.0f, 0.0f};

	glShadeModel(GL_SMOOTH);

	glEnable(GL_LIGHTING);
	glEnable(GL_LIGHT0);

	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
	glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
	glLightfv(GL_LIGHT0, GL_POSITION, position);

	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
	glEnable(GL_COLOR_MATERIAL);
	glEnable(GL_CULL_FACE);

	pfnwglMakeCurrent(oldDC, oldRC);

	return 0;
}

void CTerrainWnd::LoadTexture(bool linear)
{
	HDC oldDC = pfnwglGetCurrentDC();
	HGLRC oldRC = pfnwglGetCurrentContext();

	pfnwglMakeCurrent(m_pDC->m_hDC, m_hglRC);
	m_pTerrain->LoadTexture(linear);
	pfnwglMakeCurrent(oldDC, oldRC);
}

void CTerrainWnd::OnLButtonDown(UINT nFlags, CPoint point) 
{
	SetCapture();
	m_ptMouse = point;
	
	CWnd::OnLButtonDown(nFlags, point);
}

void CTerrainWnd::OnMouseMove(UINT nFlags, CPoint point) 
{
	if (nFlags & MK_LBUTTON)
	{
		switch (m_nAction)
		{
			case TERRAIN_ZOOM:
			{
				m_pCamera->DoZoom(point.y - m_ptMouse.y, 11, 1, false, false);
				InvalidateRect (NULL, FALSE);
			} break;

			case TERRAIN_PAN:
			{
				m_pCamera->DoPan(point.x - m_ptMouse.x, point.y - m_ptMouse.y, 11, 1, false, false);
				InvalidateRect (NULL, FALSE);
			} break;

			case TERRAIN_ROTATE:
			{
				float center[3] = { 0,0,0 };
				if (point == m_ptMouse)
					break;
				m_pCamera->DoRotate(point.x - m_ptMouse.x, point.y - m_ptMouse.y, 11, 1, false, false, center);
				InvalidateRect (NULL, FALSE);
			} break;
		}

		m_ptMouse = point;
	}

	CWnd::OnMouseMove(nFlags, point);
}

void CTerrainWnd::OnLButtonUp(UINT nFlags, CPoint point) 
{
	ReleaseCapture();
	CWnd::OnLButtonUp(nFlags, point);
}

BOOL CTerrainWnd::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	UINT c;

	switch (m_nAction)
	{
		case TERRAIN_ZOOM:	c = IDC_ZOOM;	break;
		case TERRAIN_PAN:	c = IDC_PAN;	break;
		case TERRAIN_ROTATE:c = IDC_ANGLE;	break;
		default: 
			return CWnd::OnSetCursor(pWnd, nHitTest, message);
	}
	
	SetCursor(theApp.LoadCursor(c));
	return TRUE;
}

void CTerrainWnd::ResetCamera()
{
	delete m_pCamera;
	m_pCamera = new Camera(20,20,20,0,0,0, NULL);
}