add terrain

GLTerrain/GLTerrain.cpp

@@ -26,7 +26,13 @@ int exponent = 1;
 int mouseX, mouseY;
 float cameraX, cameraY, cameraZ;
 float lookX, lookY, lookZ;
+float p_center, p_left，p_right, p_down, p_up;
 int drawMode = GL_TRIANGLE_STRIP;
+
+#define  LEVEL  256
+float colorRamp[LEVEL][4];
+int MIN_HEIGHT = 10;
+int heightColorDivision = 20;
 void Render(void);
 
 // 顶点着色器源码
@@ -102,7 +108,41 @@ void CleanUp()
 	free(imageData);
 	free(landTexture);
 }
+void initColorRamp() {
+	for (int i = 0; i < LEVEL; i++) {
 
+		colorRamp[i][0] = i / (GLfloat)LEVEL;
+
+		colorRamp[i][1] = 1 - i / (GLfloat)LEVEL;
+
+		colorRamp[i][2] = 0;
+
+		colorRamp[i][3] = 1;
+
+	}
+
+}
+GLfloat* setLevelColor(GLfloat h) {
+
+	/*if(h<(MIN_HEIGHT+colorDivision)) return colorRamp[0];
+
+	else if(h<(MIN_HEIGHT+colorDivision*1)) return colorRamp[0];*///这种效率太低，根据与最低高程的差值与颜色分度值的除运算进行
+
+	//例如分5类时，颜色分度值为(99--62)/5=32.2；高程-60，与最低高程插值为2，2与颜色分度值32.2，2/32.2取色带编号0
+
+	//高程-29.7，与最低高程差值为32.3,32.3/32.2=1,取色带编号1
+
+	//高程99,与最低高差161，161/32.2=5.0，这里可能会出现浮点数的问题，这里只能去4，所以统一在得到index时,如果大于LEVEL-1，就取LEVEL-1,如果小于0，就取0；
+
+	int index = ((h - MIN_HEIGHT) / heightColorDivision);
+
+	if (index > LEVEL - 1) index = LEVEL - 1;
+
+	if (index < 0) index = 0;
+
+	return colorRamp[index];
+
+}
 void Initialize()
 {
 	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
@@ -114,7 +154,7 @@ void Initialize()
 
 	glEnable(GL_TEXTURE_2D);
 	const char *textureFileName = "Terrain2.bmp";
-	// const char* textureFileName = "t1.bmp";
+	//const char* textureFileName = "t1.bmp";
 	char *tempName = new char[100];
 	strcpy(tempName, textureFileName);
 	imageData = LoadBitmapFile(tempName, &bitmapInfoHeader);
@@ -312,7 +352,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	AdjustWindowRectEx(&windowRect, dwStyle, FALSE, dwExStyle);
 
 	LPCWSTR title = _T("MyClass");
-	LPCWSTR WINDOW_TITLE = _T("点( 键'1'), 线 ( 键'2'),三角形( 键'3')");
+	LPCWSTR WINDOW_TITLE = _T("点( 键'1'), 线 ( 键'2'),三角形( 键'3'),顶点着色( 键'4')");
 
 	hwnd = CreateWindowEx(NULL,
 						  title,
@@ -368,7 +408,9 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 
 	return msg.wParam;
 }
+void RenderState4() {
 
+}
 void Render()
 {
 	radians = float(PI * (angle - 90.0f) / 180.0f);

GLTerrain/vkgllib.h

@@ -1,5 +1,3 @@
-//#include <glut.h>
-
 #include <iostream>
 #include <fstream>
 #include <math.h>
@@ -8,46 +6,16 @@
 using namespace std;
 #define _CRT_SECURE_NO_WARNINGS
 
-#define WINDOW_WIDTH	640				// Window Width  Default
-#define WINDOW_HEIGHT 480				// Window Height Default
+#define WINDOW_WIDTH	1024			
+#define WINDOW_HEIGHT 		720			
 
-// definition of PI
 #define PI						3.14159265
 
-// Used to defien the title of the window
-
-// A simple structure to define a point whose coordinates are integers
-/*typedef struct { GLint x, y; } GLintPoint;
-
-// This structure is used to store the vertices of a polyline
-typedef struct { int num; GLintPoint pt[100]; } GLintPointArray;
-
-// Data for an Icosahedron
-#define ICO_X	0.525731112119133606
-#define ICO_Z	0.850650808352039932*/
-
-/*static GLfloat vdataICO[12][3] =
-{
-	{ -ICO_X, 0.0, ICO_Z }, { ICO_X, 0.0, ICO_Z }, { -ICO_X, 0.0, -ICO_Z }, { ICO_X, 0.0, -ICO_Z },
-	{ 0.0, ICO_Z, ICO_X }, { 0.0, ICO_Z, -ICO_X }, { 0.0, -ICO_Z, ICO_X }, { 0.0, -ICO_Z, -ICO_X },
-	{ ICO_Z, ICO_X, 0.0 }, { -ICO_Z, ICO_X, 0.0 }, { ICO_Z, -ICO_X, 0.0 }, { -ICO_Z, -ICO_X, 0.0 }
-};
-
-static GLuint tindicesICO[20][3] =
-{
-	{ 1, 4, 0 }, { 4, 9, 0 }, { 4, 5, 9 }, { 8, 5, 4 }, { 1, 8, 4 },
-	{ 1, 10, 8 }, { 10, 3, 8 }, { 8, 3, 5 }, { 3, 2, 5 }, { 3, 7, 2 },
-	{ 3, 10, 7 }, { 10, 6, 7 }, { 6, 11, 7 }, { 6, 0, 11 }, {6, 1, 0 },
-	{ 10, 1, 6 }, { 11, 0, 9 }, { 2, 11, 9 }, { 5, 2, 9 }, { 11, 2, 7 }
-};*/
-
-// Data for Tetrahedron
 static GLfloat P1T[3] = { -2, 3, 0 }; 
 static GLfloat P2T[3] = { -3, 0, 0 };
 static GLfloat P3T[3] = { -1, 0, 3 }; 
 static GLfloat P4T[3] = { -4, 0, 0 };
 
-// Calculating the Normalized Cross Product of Two Vectors
 void normalize( float v[3] )
 {
 	GLfloat d = sqrt( float(v[0]*v[0] + v[1]*v[1] + v[2]*v[2]) );
@@ -69,62 +37,50 @@ void normcrossprod( float v1[3], float v2[3], float out[3] )
 	normalize( out );
 }
 
-////// Defines
-#define BITMAP_ID 0x4D42		      // the universal bitmap ID
-#define MAP_X	32				         // size of map along x-axis
-#define MAP_Z	32				         // size of map along z-axis
-#define MAP_SCALE	20.0f		         // the scale of the terrain map
+ 
+#define BITMAP_ID 0x4D42		    
+#define MAP_X	32				      
+#define MAP_Z	32				     
+#define MAP_SCALE	20.0f		    
 
 ////// Texture Information
-BITMAPINFOHEADER	bitmapInfoHeader;	// temp bitmap info header
-BITMAPINFOHEADER	landInfo;			// land texture info header
-BITMAPINFOHEADER	waterInfo;			// water texture info header
+BITMAPINFOHEADER	bitmapInfoHeader;	 
+BITMAPINFOHEADER	landInfo;			 
+BITMAPINFOHEADER	waterInfo;		 
 
-//AUX_RGBImageRec
-unsigned char*	      imageData;		   // the map image data
-unsigned char*       landTexture;	   // land texture data
-unsigned int		   land;			      // the land texture object
-
-////// Terrain Data
+ 
+unsigned char*	      imageData;		 
+unsigned char*       landTexture;	    
+unsigned int		   land;			   
+ 
 float terrain[MAP_X][MAP_Z][3];		// heightfield terrain data (0-255); 256x256
-
-// LoadBitmapFile
-// desc: Returns a pointer to the bitmap image of the bitmap specified
-//       by filename. Also returns the bitmap header information.
-//		   No support for 8-bit bitmaps.
+ 
 unsigned char *LoadBitmapFile(char *filename, BITMAPINFOHEADER *bitmapInfoHeader)
 {
-	FILE *filePtr;							      // the file pointer
-	BITMAPFILEHEADER	bitmapFileHeader;		// bitmap file header
-	unsigned char		*bitmapImage;			// bitmap image data
-	int					imageIdx = 0;		   // image index counter
-	unsigned char		tempRGB;				   // swap variable
+	FILE *filePtr;							     
+	BITMAPFILEHEADER	bitmapFileHeader;		 
+	unsigned char		*bitmapImage;			 
+	int					imageIdx = 0;		  
+	unsigned char		tempRGB;				  
 
-	// open filename in "read binary" mode
 	filePtr = fopen(filename, "rb");
 	if (filePtr == NULL)
 		return NULL;
 
-	// read the bitmap file header
 	fread(&bitmapFileHeader, sizeof(BITMAPFILEHEADER), 1, filePtr);
 	
-	// verify that this is a bitmap by checking for the universal bitmap id
 	if (bitmapFileHeader.bfType != BITMAP_ID)
 	{
 		fclose(filePtr);
 		return NULL;
 	}
 
-	// read the bitmap information header
 	fread(bitmapInfoHeader, sizeof(BITMAPINFOHEADER), 1, filePtr);
 
-	// move file pointer to beginning of bitmap data
 	fseek(filePtr, bitmapFileHeader.bfOffBits, SEEK_SET);
 
-	// allocate enough memory for the bitmap image data
 	bitmapImage = (unsigned char*)malloc(bitmapInfoHeader->biSizeImage);
 
-	// verify memory allocation
 	if (!bitmapImage)
 	{
 		free(bitmapImage);
@@ -132,17 +88,14 @@ unsigned char *LoadBitmapFile(char *filename, BITMAPINFOHEADER *bitmapInfoHeader
 		return NULL;
 	}
 
-	// read in the bitmap image data
 	fread(bitmapImage, 1, bitmapInfoHeader->biSizeImage, filePtr);
 
-	// make sure bitmap image data was read
 	if (bitmapImage == NULL)
 	{
 		fclose(filePtr);
 		return NULL;
 	}
 
-	// swap the R and B values to get RGB since the bitmap color format is in BGR
 	for (imageIdx = 0; imageIdx < bitmapInfoHeader->biSizeImage; imageIdx+=3)
 	{
 		tempRGB = bitmapImage[imageIdx];
@@ -150,7 +103,6 @@ unsigned char *LoadBitmapFile(char *filename, BITMAPINFOHEADER *bitmapInfoHeader
 		bitmapImage[imageIdx + 2] = tempRGB;
 	}
 
-	// close the file and return the bitmap image data
 	fclose(filePtr);
 	return bitmapImage;
 }
@@ -164,7 +116,6 @@ bool LoadTextures()
 	if (!landTexture)
 		return false;
 
-	// generate the land texture as a mipmap
 	glGenTextures(1, &land);                  
 	glBindTexture(GL_TEXTURE_2D, land);       
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

GLTerrain/x64/Debug/GLTerrain.log

@@ -1,6 +1,7 @@
   GLTerrain.cpp
-C:\Project\opengl\GLTerrain\GLTerrain\vkgllib.h(9,1): warning C4005: “_CRT_SECURE_NO_WARNINGS”: 宏重定义
+C:\Project\opengl\GLTerrain\GLTerrain\vkgllib.h(7,1): warning C4005: “_CRT_SECURE_NO_WARNINGS”: 宏重定义
 C:\Project\opengl\GLTerrain\GLTerrain\GLTerrain.cpp : message : 参见“_CRT_SECURE_NO_WARNINGS”的前一个定义
-C:\Project\opengl\GLTerrain\GLTerrain\vkgllib.h(146,30): warning C4018: “<”: 有符号/无符号不匹配
-C:\Project\opengl\GLTerrain\GLTerrain\GLTerrain.cpp(369,12): warning C4244: “return”: 从“WPARAM”转换到“int”，可能丢失数据
+C:\Project\opengl\GLTerrain\GLTerrain\vkgllib.h(99,30): warning C4018: “<”: 有符号/无符号不匹配
+C:\Project\opengl\GLTerrain\GLTerrain\GLTerrain.cpp(137,12): warning C4244: “初始化”: 从“GLfloat”转换到“int”，可能丢失数据
+C:\Project\opengl\GLTerrain\GLTerrain\GLTerrain.cpp(409,12): warning C4244: “return”: 从“WPARAM”转换到“int”，可能丢失数据
   GLTerrain.vcxproj -> C:\Project\opengl\GLTerrain\x64\Debug\GLTerrain.exe