我正在尝试在我的程序中创建一个绘制磁盘的函数。我有一个名为 drawShape 的 .h 文件,其中包含我所有的绘图函数。我正在尝试将 drawDisk 添加到其中,如下所示;但是我不断收到一条错误消息,提示我有对 gluNewQuadric 和 gluDisk 的 undefined reference 。我有 #included glu.h 库,所以我不确定我的代码有什么问题。
void drawDisk(double inDiameter, double outDiameter, int vertSlices, int horizSlices)
{
GLUquadricObj *disk;
disk = gluNewQuadric();
gluDisk(disk, inDiameter, outDiameter, vertSlices, horizSlices);
}
这是我在评论部分要求的 makefile。
VRUI_MAKEDIR := /opt/local/Vrui-2.6/share/make
ifdef DEBUG
VRUI_MAKEDIR := $(VRUI_MAKEDIR)/debug
endif
INSTALLDIR := $(shell pwd)
# Set resource directory:
RESOURCEDIR = images
########################################################################
########################################################################
# Include definitions for the system environment and system-provided
# packages
include $(VRUI_MAKEDIR)/SystemDefinitions
include $(VRUI_MAKEDIR)/Packages.System
include $(VRUI_MAKEDIR)/Configuration.Vrui
include $(VRUI_MAKEDIR)/Packages.Vrui
# Set installation directory structure:
BININSTALLDIR = $(INSTALLDIR)/$(EXEDIR)
RESOURCEINSTALLDIR = $(INSTALLDIR)/$(RESOURCEDIR)
########################################################################
########################################################################
PACKAGES = MYVRUI
########################################################################
########################################################################
ALL = $(EXEDIR)/SolarSystem
.PHONY: all
all: $(ALL)
########################################################################
#'make clean'
########################################################################
.PHONY: extraclean
extraclean:
.PHONY: extrasqueakyclean
extrasqueakyclean:
# Include basic makefile
include $(VRUI_MAKEDIR)/BasicMakefile
########################################################################
########################################################################
TEST = drawShape.cpp\
solarSystem.cpp\
planet.cpp\
skybox.cpp
$(OBJDIR)/SolarSystem.o: CFLAGS += -DPICDIR='"$(RESOURCEINSTALLDIR)"'
$(EXEDIR)/SolarSystem: $(TEST:%.cpp=$(OBJDIR)/%.o)
install: $(ALL)
@echo Installing Vrui example programs in $(INSTALLDIR)...
@install -d $(BININSTALLDIR)
@install $(ALL) $(BININSTALLDIR)
@install -d $(RESOURCEINSTALLDIR)
@install $(RESOURCEDIR)/EarthTopography.png
最佳答案
我想通了。我编写了这个函数,让我可以绘制磁盘并为其添加纹理。
void drawDisk(double radiusX, double eccentricity, int inRadius, int sideSmooth)
{
double radiusY = 0.01;
double pi = Math::Constants<double>::pi;
double texY1 = 1.0f/double(inRadius);
double lat1 = 1.0f*pi/double(inRadius)-0.5f*pi;
double r1 = cosf(lat1);
double z1 = sinf(lat1);
for(int i = 2; i < inRadius; ++i)
{
double r0 = r1;
double z0 = z1;
double texY0 = texY1;
texY1 = double(i)/double(inRadius);
lat1 = double(i)*pi/double(inRadius)-0.5f*pi;
r1 = cosf(lat1);
z1 = sinf(lat1);
glBegin(GL_QUAD_STRIP);
for(int j=0; j <= sideSmooth; ++j)
{
double texX = double(j)/double(sideSmooth);
double lng = double(j)*(2.0f*pi)/double(sideSmooth);
double x1 = cosf(lng) * r1;
double y1 = sinf(lng) * r1;
glNormal3f(x1,y1,z1);
glTexCoord2f(texX,texY1);
glVertex3f(x1*radiusX,y1*radiusX*eccentricity,z1*radiusX*radiusY);
double x0 = cosf(lng)*r0;
double y0 = sinf(lng)*r0;
glNormal3f(x0,y0,z0);
glTexCoord2f(texX,texY0);
glVertex3f(x0*radiusX,y0*radiusX*eccentricity,z0*radiusX*radiusY);
}
glEnd();
}
}
关于c++ - gluDisk() 函数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16528718/