如何做百度秒收录网站,建设自己网站软件下载,线下推广方案,unity可以做网站吗立体显示原理#xff1a;设没有立体显示的模型视图矩阵ModelView为Mv,投影矩阵为Mp#xff0c;则、物体空间的任何一点为P#xff0c;则变换到屏幕坐标P*MpMvP#xff1b;注意前面已经说过opengl里面坐标列优先#xff0c;所以矩阵都是右乘。
左眼和右眼的变换都是由中间的…立体显示原理设没有立体显示的模型视图矩阵ModelView为Mv,投影矩阵为Mp则、物体空间的任何一点为P则变换到屏幕坐标P*Mp×Mv×P注意前面已经说过opengl里面坐标列优先所以矩阵都是右乘。
左眼和右眼的变换都是由中间的变换矩阵变换而来则立体显示中左眼的变换矩阵公式为
P(L)*Ms(L) × Mp(L) × Mt(L) × Mv(L) × P
右眼的矩阵变换公式为
P(R)*Ms(R) × Mp(R) × Mt(R) × Mv(R) × P
其中MsMt是立体显示需要而增加的变换。
程序里面有几个参数现实世界眼睛到屏幕的距离Fd两眼之间的距离Sd比例尺R如图如上图没有立体显示视点位于就是中间的蓝色位置立体显示就是将左眼(红色)右眼(绿色)的视图分开绘制。
程序中左眼用红色去画右眼同时用绿色和蓝色绘制。代码
[cpp] view plaincopy#include windows.h #include GL/glut.h #include math.h #pragma comment(lib,glut32.lib) #pragma comment(lib,glu32.lib) #pragma comment(lib,opengl32.lib) void init(void) { GLfloat mat_diffuse[] { 1.0, 1.0, 0.0 }; GLfloat mat_specular[] {0.8, 0.8, 0.0, 1.0}; GLfloat mat_shininess[] { 300. }; GLfloat light_position[] { 1.0, 1.0, 1.0, 0.0 }; GLfloat light_diffuse[] { 1.0, 1.0, 0.0 }; GLfloat light_ambient[] {0.7, 0.2, 0.2, 1.0}; glClearColor (0.0, 0.0, 0.0, 0.0); glShadeModel (GL_SMOOTH); glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse); glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); glLightfv(GL_LIGHT0, GL_POSITION, light_position); glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); } /**//*---------------------------------------------------------------------------- * 初始化参数 */ GLfloat PI3.1415926; GLfloat Fd5.0; //fusion distance GLfloat RealScreenToEyeDistance1.0; GLfloat R Fd / RealScreenToEyeDistance; //比例尺 R Fd / RealScreenToEyeDistance GLfloat Sd 0.05; //两眼之间的距离 GLfloat aspect 1.0; //gluLookAt函数里面的参数 GLfloat fovy 60.0; //张角 GLfloat f 1 / tan( (fovy * PI) / (2 * 180) ); //fctg(fovy/2); //列优先的矩阵模型视图矩阵投影矩阵 GLfloat LeftModelViewMatrix[16] { 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, Sd * R / 2.0, 0.0, 0.0, 1.0 }; GLfloat LeftProjectMatrix[16] { 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, -(Sd * f) / (2.0 * Fd * aspect), 0.0, 0.0, 1.0 }; GLfloat RightModelViewMatrix[16] { 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, -Sd * R / 2.0, 0.0, 0.0, 1.0 }; GLfloat RightProjectMatrix[16] { 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, (Sd * f) / (2.0 * Fd * aspect), 0.0, 0.0, 1.0 }; //for the use of rotating static GLfloat spin 0.0; void display(void) { GLfloat matrix[16]{0.}; glColorMask(1.0, 1.0, 1.0, 1.0); glClearColor(0.0, 0.0, 0.0, 1.0); glClearDepth(1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glColor3f(1.0, 1.0, 1.0); //--------------------------------------------------------------------------------------------- //Left View port glMatrixMode(GL_PROJECTION); glPushMatrix(); { glGetFloatv(GL_PROJECTION_MATRIX, matrix); glLoadIdentity(); glMultMatrixf(LeftProjectMatrix); glMultMatrixf(matrix); { glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslated(0.0, 0.0, -Fd); glPushMatrix(); { glGetFloatv(GL_MODELVIEW_MATRIX, matrix); glLoadIdentity(); glMultMatrixf(LeftModelViewMatrix); glMultMatrixf(matrix); glColorMask(1.0, 0.0, 0.0, 1.0); /**//* * 物体的坐标Vp * 变换到屏幕坐标Vp LeftProjectMatrix×Mp × LeftModelViewMatrix×Mv × Mr×Vp */ glPushMatrix(); { glRotatef(spin, 0.0, 1.0, 0.0); glutSolidTeapot(1.0); } glPopMatrix(); } } glPopMatrix(); glMatrixMode(GL_PROJECTION); } glPopMatrix(); glFlush(); //--------------------------------------------------------------------------------------------- //Right View port glMatrixMode(GL_PROJECTION); glPushMatrix(); { glGetFloatv(GL_PROJECTION_MATRIX, matrix); glLoadIdentity(); glMultMatrixf(RightProjectMatrix); glMultMatrixf(matrix); glMatrixMode(GL_MODELVIEW); glPushMatrix(); { glGetFloatv(GL_MODELVIEW_MATRIX, matrix); glLoadIdentity(); glMultMatrixf(RightModelViewMatrix); glMultMatrixf(matrix); glColorMask(0.0, 1.0, 1.0, 1.0); glClearDepth(1.0); glClear(GL_DEPTH_BUFFER_BIT); /**//* * 物体的坐标Vp * 变换到屏幕坐标Vp RightProjectMatrix×Mp× RightModelViewMatrix×Mv × Mr×Vp */ glPushMatrix(); { glRotatef(spin, 0.0, 1.0, 0.0); glutSolidTeapot(1.0); //glutSolidSphere(1.0, 20, 5); } } glPopMatrix(); glMatrixMode(GL_PROJECTION); } glPopMatrix(); glFlush (); glutSwapBuffers(); } void reshape (int w, int h) { if (h 0) { h 1; } glViewport (0, 0, (GLsizei) w, (GLsizei) h); glMatrixMode (GL_PROJECTION); glLoadIdentity(); //投影矩阵Mp gluPerspective(fovy, (GLfloat)w / (GLfloat)h, 1.0, 20.0); } void spinDisplay(void) { spin spin 1.0; if (spin 360.0) { spin spin - 360.0; } glutPostRedisplay(); } int main(int argc, char** argv) { glutInit(argc, argv); glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize (500, 500); glutInitWindowPosition (100, 100); glutCreateWindow (argv[0]); init (); glutDisplayFunc(display); glutReshapeFunc(reshape); glutIdleFunc(spinDisplay); glutMainLoop(); return 0; }
