图形学实验报告(5)

{ }

void Normal(double a[3], double b[3], double c[3], double n[3]) {

for(int a = 0; a < 36; a++) { }

for(int r = 0; r < 10; r++) { }

parabolicSurf[a][r][0] = (DELTA*r)*cos(a*PI2/36.0); parabolicSurf[a][r][1] = (DELTA*r)*sin(a*PI2/36.0); parabolicSurf[a][r][2] = (DELTA*r)*(DELTA*r);

int i;

double p[3], q[3];

for(i = 0; i < 3; i++) { }

p[i] = b[i] - a[i]; q[i] = c[i] - a[i];

n[0] = p[1]*q[2] - p[2]*q[1];

}

n[1] = p[2]*q[0] - p[0]*q[2]; n[2] = p[0]*q[1] - p[1]*q[0];

double t = n[0]*n[0] + n[1]*n[1] + n[2]*n[2];

t = sqrt(t);

for(i = 0; i < 3; i++)

n[i] /= t;

void ComputeVertexNormal() {

double quadNormal[36][9][3]; double n[3]; double t;

int a; int r; int i;

for(a = 0; a < 36; a++) {

for(r = 0; r < 9; r++)

}

{ }

Normal(parabolicSurf[a][r],

parabolicSurf[a][r + 1],

parabolicSurf[(a + 1)6][r + 1], quadNormal[a][r]);

for(a = 0; a < 36; a++) { }

vertexNormal[a][0][0] = 0.0; vertexNormal[a][0][1] = 0.0; vertexNormal[a][0][2] = 1.0;

for(a = 0; a < 36; a++) {

for(r = 1; r < 9; r++) {

for(i = 0; i < 3; i++) {

n[i] = 0.0;

n[i] += quadNormal[a][r][i]; n[i] += quadNormal[a][r - 1][i];

}

n[i] += quadNormal[(a - 1 + 36)6][r][i]; n[i] += quadNormal[(a - 1 + 36)6][r - 1][i];

t = n[0]*n[0] + n[1]*n[1] + n[2]*n[2];

t = sqrt(t);

}

}

for(i = 0; i < 3; i++) { }

vertexNormal[a][r][i] = n[i]/t;

for(a = 0; a < 36; a++) {

r = 9;

for(i = 0; i < 3; i++) {

n[i] = 0.0;

n[i] += quadNormal[a][r - 1][i];

n[i] += quadNormal[(a - 1 + 36)6][r - 1][i];

}

}

t = n[0]*n[0] + n[1]*n[1] + n[2]*n[2];

t = sqrt(t);

}

for(i = 0; i < 3; i++) { }

vertexNormal[a][r][i] = n[i]/t;

void MakeImage(void) {

int i, j, c;

//棋盘

for (i = 0; i < checkImageHeight; i++) { for (j = 0; j < checkImageWidth; j++) { c = ((((i&0x8)==0)^((j&0x8))==0))*255; checkImage[i][j][0] = (GLubyte) c; checkImage[i][j][1] = (GLubyte) c; checkImage[i][j][2] = (GLubyte) c;

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