opengl c++求大神知道为什么我的光总是不能照到我的物体上啊！

weixin_41288181 2018-11-17 03:27:51
先放上运行图，可以看到正面看时比较暗，但是从上往下看时能感觉到地面是被照亮的，我怎么改lightposition的坐标都没用，求大佬指点！



下面放上源码
#include "stdafx.h"

#include <stdio.h>

#include <stdlib.h>

#include <GL/glut.h>

#include<gl/glaux.h>

#include <math.h>

#include <time.h>

 

#pragma comment(lib, "opengl32.lib")

#pragma comment(lib, "glut32.lib")

#pragma comment(lib, "glu32.lib")

#pragma comment(lib, "glut.lib")

#pragma comment(lib, "glaux.lib")

#pragma comment(lib,"legacy_stdio_definitions.lib")

 



int WinWidth, WinHeight;

double posX, posY, posZ, viewX, viewY, viewZ, upX, upY, upZ;

const GLfloat PI = 3.141515926;

int use = 0;

GLfloat xRot = 0.0f;

GLfloat yRot = 0.0f;

UINT ground, box,box1;

const char* aa = "E://3up/box.bmp";

const char* bb = "E://3up/ground2.bmp";

const char* cc = "E://3up/box1.bmp";

const char* dd = "E://3up/dd.bmp";

const char* ee = "E://3up/ground1.bmp";

int light = 1;

bool r = true;

bool ct = true;





void setUpRc() {

	GLfloat LightAmbient[] = { 0.0f,0.0f,0.0f,1.0f };//环境光参数 黑

	GLfloat LightDiffuse[] = { 1.0f,1.0f,1.0f,1.0f };//漫射光参数

	GLfloat LightSpecular[] = { 1.0f,1.0f,1.0f,1.0f, };//白

	GLfloat LightPosition[] = { 0.0f, 30.0f,5.0f,1.0f }; //光源位置 



	glPushMatrix();

	glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient);

	glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse);

	glLightfv(GL_LIGHT1, GL_SPECULAR, LightSpecular);

	glLightfv(GL_LIGHT1, GL_POSITION, LightPosition);

	glPopMatrix();

	glEnable(GL_LIGHTING);

	glEnable(GL_LIGHT1);

	 

	//glFrontFace(GL_CW);

	glEnable(GL_DEPTH_TEST);

 







}

void setAll(double px, double py, double pz,

	double vx, double vy, double vz,

	double ux, double uy, double uz)

{

	posX = px;

	posY = py;

	posZ = pz;

	viewX = vx;

	viewY = vy;

	viewZ = vz;

	upX = ux;

	upY = uy;

	upZ = uz;

}



void setLookAt() {

	gluLookAt(posX, posY, posZ,

		viewX, viewY, viewZ,

		upX, upY, upZ);

	glPushMatrix();

}



void setPos(double x, double y, double z) {

	posX = x;

	posY = y;

	posZ = z;

}



void DisplayBox1() {



 

	float x, y, z;

	glPushMatrix();



	glScalef(x=4, y=4, z=4);



	glEnable(GL_TEXTURE_2D); //贴图有效

	glRotatef(xRot, 0.0f, 3.0f, 0.0f);

	glBindTexture(GL_TEXTURE_2D, box);

	GLfloat ambient[] = { 0.3f,0.2f,0.0f,1.0f, };

	GLfloat diffuse[] = { 0.8f,0.6f,0.1f,1.0f, };

	GLfloat specular[] = { 1.0f,1.0f,0.8f,1.0f, };



	glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);

	glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse);

	glMaterialfv(GL_FRONT, GL_SPECULAR, specular);

	glMaterialf(GL_FRONT, GL_SHININESS, 50.0);

	//glMateriali(GL_FRONT, GL_SHININESS, 128);

	glBegin(GL_QUADS);



	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);// 前

	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f);

	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 3.0f, 1.0f);

	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 3.0f, 1.0f);

	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f, -1.0f);// 后

	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 3.0f, -1.0f);

	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f,3.0f, -1.0f);

	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, 1.0f, -1.0f);

	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 3.0f, -1.0f);// 上

	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 3.0f, 1.0f);

	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 3.0f, 1.0f);

	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 3.0f, -1.0f);

	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);// 下

	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, -1.0f);

	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f);

	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);

	glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 1.0f, -1.0f);// 左

	glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 3.0f, -1.0f);

	glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 3.0f, 1.0f);

	glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, 1.0f, 1.0f);

	glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, -1.0f);// 右

	glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);

	glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 3.0f, 1.0f);

	glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 3.0f, -1.0f);



	glEnd();



	glDisable(GL_TEXTURE_2D);//取消贴图



	glPopMatrix();

 



}

 

 void DisplayBox2() {





	 float x, y, z;

	 glPushMatrix();



	 glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE);

	 



	 glPushMatrix();

	 glScalef(x = 2, y = 2, z = 2);

	 glEnable(GL_TEXTURE_2D); //贴图有效

	 glRotatef(yRot, 0.0f, 3.0f, 0.0f);

	 glBindTexture(GL_TEXTURE_2D, box1);



	 GLfloat ambient[] = { 0.2f,0.2f,0.1f,1.0f, };

	 GLfloat diffuse[] = { 0.3f,0.3f,0.1f,1.0f, };

	 GLfloat specular[] = { 0.8f,0.7f,0.2f,1.0f, };



	 glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);

	 glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse);

	 glMaterialfv(GL_FRONT, GL_SPECULAR, specular);

	 glMaterialf(GL_FRONT, GL_SHININESS, 80.0);

	 glBegin(GL_QUADS);



	 glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 8.0f, 1.0f);// 前

	 glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 8.0f, 1.0f);

	 glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 10.0f, 1.0f);

	 glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 10.0f, 1.0f);

	 glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 8.0f, -1.0f);// 后

	 glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 10.0f, -1.0f);

	 glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 10.0f, -1.0f);

	 glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, 8.0f, -1.0f);

	 glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 10.0f, -1.0f);// 上

	 glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 10.0f, 1.0f);

	 glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 10.0f, 1.0f);

	 glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 10.0f, -1.0f);

	 glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 8.0f, -1.0f);// 下

	 glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 8.0f, -1.0f);

	 glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, 8.0f, 1.0f);

	 glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 8.0f, 1.0f);

	 glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, 8.0f, -1.0f);// 左

	 glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 10.0f, -1.0f);

	 glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 10.0f, 1.0f);

	 glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, 8.0f, 1.0f);

	 glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 8.0f, -1.0f);// 右

	 glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 8.0f, 1.0f);

	 glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 10.0f, 1.0f);

	 glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 10.0f, -1.0f);



	 glEnd();



	 glDisable(GL_TEXTURE_2D);//取消贴图



	 glPopMatrix();

	  





 }

void Ground() {



	glEnable(GL_TEXTURE_2D);

	glEnable(GL_DEPTH_TEST);

	glBindTexture(GL_TEXTURE_2D, ground);

	GLfloat ambient[] = { 0.2f,0.2f,0.2f,1.0f, };

	GLfloat diffuse[] = { 0.2f,0.2f,0.2f,1.0f, };

	GLfloat specular[] = { 0.5f,0.5f,0.5f,1.0f, };



	glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);

	glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse);

	glMaterialfv(GL_FRONT, GL_SPECULAR, specular);

	glMaterialf(GL_FRONT, GL_SHININESS, 5.0);

	glBegin(GL_QUADS);

	glNormal3f(0.0f, 1.0f, 0.0f);

	for (int z = 0; z < 20; z++) {

		float zStart = 100.0f - z * 10.0f;

		for (int x = 0; x < 20; x++) {

			float xStart = x * 10.0f - 100.0f;

			glColor4ub(200, 200, 200, 255);

			glTexCoord2f(0.0f, 0.0f);

			glVertex3f(xStart, -1.0f, zStart);

			glTexCoord2f(1.0f, 0.0f);

			glVertex3f(xStart + 10.0f, -1.0f, zStart);

			glTexCoord2f(0.0f, 1.0f);

			glVertex3f(xStart + 10.0f, -1.0f, zStart - 10.0f);

			glTexCoord2f(1.0f, 1.0f);

			glVertex3f(xStart, -1.0f, zStart - 10.0f);

		}

	}

	glEnd();

	glDisable(GL_TEXTURE_2D);



}

bool LoadTexture(char *filename, GLuint &texture) {

	AUX_RGBImageRec *pImage = auxDIBImageLoadA(filename);

	if (pImage == NULL) return false;

	glGenTextures(1, &texture);

	 

		glBindTexture(GL_TEXTURE_2D, texture);

		gluBuild2DMipmaps(GL_TEXTURE_2D, 4, pImage->sizeX, pImage->sizeY, GL_RGB, GL_UNSIGNED_BYTE, pImage->data);

		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	return true;



}



 



 

void Display() {

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	 								 

	Ground();

	DisplayBox1();

	DisplayBox2();

	glutSwapBuffers();

}



void update() {

	glLoadIdentity();

	setLookAt();

	glutPostRedisplay();

}

 

void TimerFunc(int value)

{

	static double delta;

	switch (value) {

	case 0:

	  

			if (r == true) {

				xRot -= 1.0f;

				yRot += 1.0f;

				glutTimerFunc(20, TimerFunc, 0);

				glutPostRedisplay();

			}

			else;

	 

		break;

	case 1:

		xRot += 1.0f;

		yRot -= 1.0f;

		glutPostRedisplay();

		glutTimerFunc(20, TimerFunc, 1);

		break;

	 

 



	}

  

	

}

 



void init() {

	glClearColor(0.0, 0.0, 0.0, 0.0);

	char* id1 = const_cast<char*>(aa);

	char* id2 = const_cast<char*>(bb);

	char* id3 = const_cast<char*>(cc);

	char* id4 = const_cast<char*>(dd);

	char* id5 = const_cast<char*>(ee);

	if (ct == true) {

		LoadTexture(id1, box);

		LoadTexture(id2, ground);

	}

	else {

		LoadTexture(id4, box);

		LoadTexture(id5, ground);

	}

 

	LoadTexture(id3, box1);

	setAll(20, 20, 10, 0, 11, 0, 0, 5, 0);

	 

	//glPushMatrix();

	//glLoadIdentity();

	 

	 

 

}



void ProcessKeyBoard(int key, int x, int y) {

	static double delta;

	if (key == GLUT_KEY_LEFT) {

		delta += 0.03;

		setPos(20 * cos(delta), posY, 20 * sin(delta));

		glPushMatrix();

	}

	else if (key == GLUT_KEY_RIGHT) {

		delta -= 0.03;

		setPos(20 * cos(delta), posY, 20 * sin(delta));

		glPushMatrix();

	}

	else if (key == GLUT_KEY_UP) {

		delta += 0.03;

		setPos(20 * cos(delta), 40 * sin(delta), posZ);

		glPushMatrix();

	}

	else if (key == GLUT_KEY_DOWN) {

		delta -= 0.03;

		setPos(20 * cos(delta), 40 * sin(delta), posZ);

		glPushMatrix();

	}

	else if (key == GLUT_KEY_F1) {

		r = true;

		//TimerFunc(0);

	    glutTimerFunc(20, TimerFunc, 0);		 

	}

	else if (key == GLUT_KEY_F2) {

		r = false;

		TimerFunc(0);

	}

	else if (key == GLUT_KEY_F3) {

		if (light)

		{

			light = 0;

			glDisable(GL_LIGHTING);

			printf("off\n");

		}

		else

		{

			light = 1;

			glEnable(GL_LIGHTING);

			printf("on\n");

		}		 

	}

	else if (key == GLUT_KEY_F4) {

		ct = false;

		init();

		

	}

	else if (key == GLUT_KEY_F5) {

		ct = true;

		init();



	}

}

 

void myMouse(int button, int state, int x, int y) {

	if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) {



		glMatrixMode(GL_PR
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