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xstereograph-2.1-strings.patch
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File xstereograph-2.1-strings.patch of Package xstereograph
--- src/bd_help.h +++ src/bd_help.h @@ -1,100 +1,93 @@ -char bd_help[]="\ -The depthmap builder is a powerful tool allowing to build a depthmap -by assigning to each point of coordinates (x,y) in a rectangle -x1 <= x <= x2, y1 <= y <= y2, a luminosity value in the rangle 0..255. -The width and height in pixels of the desired resulting image should -be specified in the relevant entries. - -The luminosity is calculated mathematically as a result of the position -of all objects present in the scene, and depends linearly on the value -of the third coordinate z, which is viewed as perpendicular to the Oxy -screen plane. The user should thus also specify the lower and upper -values of z. If several objects have parts sharing the same values of -(x,y), only those parts corresponding to the upper layer (z maximal) -are represented. - -The user should enter a C procedure defining the objects to be built, -as for the provided examples in the mathfiles/ directory. This -procedure is then embedded in suitable C code to produce a .pgm file -(portable gray bitmap). The pnmtotiff utility is finally used to -convert this image into the tif format required by SIS. As a -consequence, the depthmap builder will only work if you have -pnmtotiff or a similar utility installed on your system. - -Several position and drawing primitives can be used, in any combination -position primitives -- drawing primitives, -position primitives -- drawing primitives, -position primitives -- drawing primitives... - - -Position primitives: - -1. rotation_angles(double a, double b, double c); - -Rotates an object by an angle a with respect to 0xy, b with respect to -0xz and c with respect to 0yz. All angles in degrees. -Default values: a=0, b=0, c=0. - -2. scale(double h); -Sets an homothety factor equal to h. All three coordinates x,y,z are -multiplied by h. -Default value: h=1. - -3. translation(double a, double b, double c); - -Translates coordinates (x,y,z) by (a,b,c). -Default values: (a,b,c)=(0,0,0). - - -Drawing primitives: - -0. max(double x, double y); min(double x, double y); - -standard max and min functions. - -1. mesh(point *p, int i, int j, int k); - -Here \"point\" is the predefined type double[3], and p is an -array of points, e.g. point p[15], representing 15 points -as triples of coordinates (x,y,z). The above mesh primitive -draws the 3D-triangle whose vertices are p[i], p[j], p[k]. - -2. build(BFunction bfunct); - -where BFunction is the predefined void function type -typedef void (*BFunction)(); - -bfunct() is used to define the object, e.g. as a collection of -triangular meshes, and build(bfunct) makes the actual drawing. - -3. graph(PFunction pfunct, double u1, double u2, int nu, - double v1, double v2, int nv); - -where PFunction is the predefined function type -typedef void (*PFunction)(point p, double u, double v); - -pfunct(p,u,v) assigns to parameters (u,v) a point - p={x(u,v),y(u,v),z(u,v)}. -The procedure graph(pfunct, u1,u2,nu, v1,v2,nv); draws the -graph for u1 <= u <= u2, v1 <= v <= v2, by using a subdvision -in nu subintervals for u and nv subintervals for v. - -4. light(ZFunction zfunct); - -with predefined function type -typedef double (*ZFunction)(double x, double y); - -The function zfunct prescribes the depth as z=zfunct(x,y), and -light(zfunct) assigns the luminosity accordingly. -NOTE: The position primitives have no effect on the light procedure. - - -Check examples in the /mathfiles directory to see how all this works. +char bd_help[]="\ +The depthmap builder is a powerful tool allowing to build a depthmap\n\ +by assigning to each point of coordinates (x,y) in a rectangle \n\ +x1 <= x <= x2, y1 <= y <= y2, a luminosity value in the rangle 0..255.\n\ +The width and height in pixels of the desired resulting image should\n\ +be specified in the relevant entries.\n\ +\n\ +The luminosity is calculated mathematically as a result of the position \n\ +of all objects present in the scene, and depends linearly on the value \n\ +of the third coordinate z, which is viewed as perpendicular to the Oxy \n\ +screen plane. The user should thus also specify the lower and upper \n\ +values of z. If several objects have parts sharing the same values of\n\ +(x,y), only those parts corresponding to the upper layer (z maximal)\n\ +are represented. \n\ +\n\ +The user should enter a C procedure defining the objects to be built,\n\ +as for the provided examples in the mathfiles/ directory. This\n\ +procedure is then embedded in suitable C code to produce a .pgm file\n\ +(portable gray bitmap). The pnmtotiff utility is finally used to\n\ +convert this image into the tif format required by SIS. As a\n\ +consequence, the depthmap builder will only work if you have \n\ +pnmtotiff or a similar utility installed on your system.\n\ +\n\ +Several position and drawing primitives can be used, in any combination\n\ +position primitives -- drawing primitives, \n\ +position primitives -- drawing primitives,\n\ +position primitives -- drawing primitives...\n\ +\n\ +\n\ +Position primitives:\n\ +\n\ +1. rotation_angles(double a, double b, double c);\n\ +\n\ +Rotates an object by an angle a with respect to 0xy, b with respect to\n\ +0xz and c with respect to 0yz. All angles in degrees.\n\ +Default values: a=0, b=0, c=0.\n\ +\n\ +2. scale(double h);\n\ +Sets an homothety factor equal to h. All three coordinates x,y,z are \n\ +multiplied by h.\n\ +Default value: h=1.\n\ +\n\ +3. translation(double a, double b, double c);\n\ +\n\ +Translates coordinates (x,y,z) by (a,b,c).\n\ +Default values: (a,b,c)=(0,0,0).\n\ +\n\ +\n\ +Drawing primitives:\n\ +\n\ +0. max(double x, double y); min(double x, double y);\n\ +\n\ +standard max and min functions.\n\ +\n\ +1. mesh(point *p, int i, int j, int k);\n\ +\n\ +Here \"point\" is the predefined type double[3], and p is an\n\ +array of points, e.g. point p[15], representing 15 points\n\ +as triples of coordinates (x,y,z). The above mesh primitive \n\ +draws the 3D-triangle whose vertices are p[i], p[j], p[k].\n\ +\n\ +2. build(BFunction bfunct);\n\ +\n\ +where BFunction is the predefined void function type\n\ +typedef void (*BFunction)();\n\ +\n\ +bfunct() is used to define the object, e.g. as a collection of \n\ +triangular meshes, and build(bfunct) makes the actual drawing.\n\ +\n\ +3. graph(PFunction pfunct, double u1, double u2, int nu,\n\ + double v1, double v2, int nv);\n\ +\n\ +where PFunction is the predefined function type\n\ +typedef void (*PFunction)(point p, double u, double v);\n\ +\n\ +pfunct(p,u,v) assigns to parameters (u,v) a point\n\ + p={x(u,v),y(u,v),z(u,v)}. \n\ +The procedure graph(pfunct, u1,u2,nu, v1,v2,nv); draws the \n\ +graph for u1 <= u <= u2, v1 <= v <= v2, by using a subdvision\n\ +in nu subintervals for u and nv subintervals for v.\n\ +\n\ +4. light(ZFunction zfunct);\n\ +\n\ +with predefined function type\n\ +typedef double (*ZFunction)(double x, double y);\n\ +\n\ +The function zfunct prescribes the depth as z=zfunct(x,y), and\n\ +light(zfunct) assigns the luminosity accordingly. \n\ +NOTE: The position primitives have no effect on the light procedure.\n\ +\n\ +\n\ +Check examples in the /mathfiles directory to see how all this works.\n\ "; - - - - - - - --- src/help.h +++ src/help.h @@ -1,41 +1,41 @@ -char sis_help[] = "\ -Xstereograph/Magic-eye is a user friendly X-frontend to Stereograph, -a fancy SIS generator (SIS = Single Image Stereogram) written by -Fabian Januszewski. In a few words, a SIS generator produces -plane images which can be interpreted and look like 3D images. - -How does Stereograph operates? Well, as follows. Starting from -two images, -* a depth image, providing information on the shape - and distance of the \"magic object\" to be displayed, -* a texture, giving the output its superficial appearance, -Stereograph combines them into a single output image (performing -clever anti-aliasing and anti-artifact procedures along the way). - -As a result, a 3-D stereogram is generated. In such a stereogram, -the \"magic\" object is somehow hidden, although you can see it with -bare eyes after your eyes reach a suitable position and focus. - -The \"Select\" buttons are used to select the depth image and texture, -respectively. The \"Randomize\" buttons provide random selections from -the distributed sis/depth_maps and sis/textures. If no depth image has -been selected, magic-eye implicitly provides a random selection as well. -If no texture has been selected (\"Selection\" then indicates \"Texture: -\"), -magic-eye uses a chaotic distribution of 8bit color pixels, through -the option -C of Stereograph, in place of the texture image. - -It is also possible to produce stereograms from user built depth_map and -texture images, rather than from the distributed demo files. - -Note: these files must be in .PNG, .PPM or .TGA format (use e.g. povray -to produce such files). The depth_map should only use gray scale colors. - -Credits: Xstereograph is written using the simple X library libsx by -Dominic Giampaolo -- which does indeed provide very easy access -to programming under X11. - -Man page: More details on the technical aspects of SIS stereograms -operation can be obtained from the stereograph manual page, as -displayed by the \"Man page\" option from the \"About\" button. +char sis_help[] = "\ +Xstereograph/Magic-eye is a user friendly X-frontend to Stereograph,\n\ +a fancy SIS generator (SIS = Single Image Stereogram) written by\n\ +Fabian Januszewski. In a few words, a SIS generator produces \n\ +plane images which can be interpreted and look like 3D images.\n\ +\n\ +How does Stereograph operates? Well, as follows. Starting from \n\ +two images,\n\ +* a depth image, providing information on the shape \n\ + and distance of the \"magic object\" to be displayed,\n\ +* a texture, giving the output its superficial appearance,\n\ +Stereograph combines them into a single output image (performing\n\ +clever anti-aliasing and anti-artifact procedures along the way).\n\ +\n\ +As a result, a 3-D stereogram is generated. In such a stereogram, \n\ +the \"magic\" object is somehow hidden, although you can see it with\n\ +bare eyes after your eyes reach a suitable position and focus.\n\ +\n\ +The \"Select\" buttons are used to select the depth image and texture, \n\ +respectively. The \"Randomize\" buttons provide random selections from\n\ +the distributed sis/depth_maps and sis/textures. If no depth image has \n\ +been selected, magic-eye implicitly provides a random selection as well. \n\ +If no texture has been selected (\"Selection\" then indicates \"Texture: -\"),\n\ +magic-eye uses a chaotic distribution of 8bit color pixels, through\n\ +the option -C of Stereograph, in place of the texture image.\n\ +\n\ +It is also possible to produce stereograms from user built depth_map and \n\ +texture images, rather than from the distributed demo files. \n\ +\n\ +Note: these files must be in .PNG, .PPM or .TGA format (use e.g. povray \n\ +to produce such files). The depth_map should only use gray scale colors.\n\ +\n\ +Credits: Xstereograph is written using the simple X library libsx by \n\ +Dominic Giampaolo -- which does indeed provide very easy access\n\ +to programming under X11.\n\ +\n\ +Man page: More details on the technical aspects of SIS stereograms\n\ +operation can be obtained from the stereograph manual page, as\n\ +displayed by the \"Man page\" option from the \"About\" button.\n\ "; --- src/xstereograph.c +++ src/xstereograph.c @@ -328,259 +328,259 @@ /* Building sis-depth.c program */ fprintf(fd, "\ -#include <stdlib.h> -#include <stdio.h> -#include <math.h> - -#define PI 3.14159265358979 -#define COLORDEPTH %d -#define COLOREXTEN %d -#define WIDTH %s -#define HEIGHT %s - -typedef double point[3]; - -typedef void (*BFunction)(); -typedef double (*ZFunction)(double x, double y); -typedef void (*PFunction)(point p, double x, double y); - -const double CONV_RAD=M_PI/180; -int do_init = 1; -short int pixel_color[WIDTH][HEIGHT]; -double x_1=%s, x_2=%s, y_1=%s, y_2=%s, z_1=%s, z_2=%s; -double ratio_x, ratio_y, ratio_z; -double m_rot[12]={1,0,0,0,0,1,0,0,0,0,1,0}; - -double max(double x, double y) -{ - if(x>=y) return x; else return y; -} - -double min(double x, double y) -{ - if(x>=y) return x; else return y; -} - -void do_init_image() -{ -int i,j; - - if (do_init) - { - for(j=0; j<HEIGHT; j++) for(i=0; i<WIDTH; i++) pixel_color[i][j] = 0; - ratio_x = (x_2-x_1)/(double)WIDTH; - ratio_y = (y_2-y_1)/(double)HEIGHT; - if(ratio_x==0 || ratio_y==0) exit(1); - ratio_z = z_2-z_1; - if(ratio_z<=0) exit(1); else ratio_z = ((double)COLOREXTEN)/ratio_z; - do_init = 0; - } -} - -void translation(double a, double b, double c) -{ - m_rot[3] = a; - m_rot[7] = b; - m_rot[11] = c; -} - -void scale(double a) -{ -int i; - - for (i=0; i<=11; i++) m_rot[i] *= a; -} - -void rotation_angles(double theta, double phi, double psi) -{ -double ca,cb,cc, sa,sb,sc; - - ca=theta*CONV_RAD; - cb=phi*CONV_RAD; - cc=psi*CONV_RAD; - - sa=sin(ca); ca=cos(ca); - sb=sin(cb); cb=cos(cb); - sc=sin(cc); cc=cos(cc); - - m_rot[0] = ca*cb; - m_rot[1] = -sa*cc-ca*sb*sc; - m_rot[2] = sa*sc-ca*sb*cc; - - m_rot[4] = sa*cb; - m_rot[5] = ca*cc-sa*sb*sc; - m_rot[6] = -ca*sc-sa*sb*cc; - - m_rot[8] = sb; - m_rot[9] = cb*sc; - m_rot[10]= cb*cc; - -} - -void rotate(point p, point q) -{ -int i,j; - for(i=0; i<=2; i++) - { - j=4*i; - q[i] = m_rot[j]*p[0]+m_rot[j+1]*p[1]+m_rot[j+2]*p[2]+m_rot[j+3]; - } -} - -void setpoint(point p, point q) -{ -int i; - - for(i=0; i<=2; i++) p[i] = q[i]; -} - -void mesh(point *p, int h, int i, int j) -{ -point a[3]; -double ca,cb,cc,cd, delta, s,t, adds,addt, x, y, z, z0,z1,z2; -int u1, u2, v1, v2; -int k,l,m; - - do_init_image(); - rotate(p[h],a[0]); - rotate(p[i],a[1]); - rotate(p[j],a[2]); - - u1=WIDTH; u2=-1; - v1=HEIGHT; v2=-1; - - for(k=0; k<=2; k++) - { - l=(int)((a[k][0]-x_1)/ratio_x); - if(l<u1) u1=l; - if(l>u2) u2=l; - l=(int)((y_2-a[k][1])/ratio_y); - if(l<v1) v1=l; - if(l>v2) v2=l; - } - - if(u1<0) u1=0; - if(u2>=WIDTH) u2=WIDTH-1; - if(v1<0) v1=0; - if(v2>=HEIGHT) v2=HEIGHT-1; - if(u1>u2 || v1>v2) return; - - z0 = a[0][2]; - z1 = a[1][2]-z0; - z2 = a[2][2]-z0; - - z0 = (z0-z_1)*ratio_z; - z1 = z1*ratio_z; - z2 = z2*ratio_z; - - delta = (a[1][0]-a[0][0])*(a[2][1]-a[0][1]) - - (a[1][1]-a[0][1])*(a[2][0]-a[0][0]); - if (fabs(delta)<1E-5) return; - - delta=1/delta; - ca = (a[2][1]-a[0][1])*delta; - cb = (a[0][0]-a[2][0])*delta; - cc = (a[0][1]-a[1][1])*delta; - cd = (a[1][0]-a[0][0])*delta; - adds = ca*ratio_x; - addt = cc*ratio_x; - - for(l=v1; l<=v2; l++) - { - x = x_1 + u1*ratio_x - a[0][0]; - y = y_2 - l*ratio_y - a[0][1]; - s = ca*x + cb*y; - t = cc*x + cd*y; - for(k=u1; k<=u2; k++) - { - if (s>=-0.0001 && t>=-0.0001 && s+t<=1.0001) - { - m = (int) (z0 + s*z1 + t*z2); - if (m<0) m=0; - if (m>COLOREXTEN) m=COLOREXTEN; - if (m>pixel_color[k][l]) pixel_color[k][l] = m; - } - s = s + adds; - t = t + addt; - } - } -} - -void build(BFunction bfunct) -{ - do_init_image(); - bfunct(); -} - -void light(ZFunction zfunct) -{ -int i, j; -int k; -double x,y; - - do_init_image(); - - for(j=0; j<HEIGHT; j++) - { - y = y_2-ratio_y*j; - for(i=0; i<WIDTH; i++) - { - x = ratio_x*i+x_1; - k = (int)((zfunct(x,y)-z_1)*ratio_z); - if (k<0) k=0; - if (k>COLOREXTEN) k=COLOREXTEN; - if (k>pixel_color[i][j]) pixel_color[i][j] = k; - } - } -} - -void graph(PFunction pfunct, double xi, double xs, int nx, - double yi, double ys, int ny) -{ -int i, j, l; -double hx,hy; -point p[4]; - - if(nx<=0 || ny<=0) return; - - do_init_image(); - - hx = (xs-xi)/nx; - hy = (ys-yi)/ny; - - for(j=0; j<ny; j++) - { - for(l=0; l<=1; l++) - pfunct(p[l],xi,yi+(j+l)*hy); - - for(i=1; i<=nx; i++) - { - setpoint(p[2],p[0]); setpoint(p[3],p[1]); - for(l=0; l<=1; l++) - pfunct(p[l], xi+i*hx,yi+(j+l)*hy); - mesh(p,0,1,2); mesh(p,1,2,3); - } - } -} - -int main(int argc, char **argv) -{ -int i, j; - - %s - - printf(\"P6\\n# CREATOR: sis\\n\"); - printf(\" %%d %%d %%d\\n\", WIDTH, HEIGHT, COLORDEPTH); - - for(j=0; j<HEIGHT; j++) for(i=0; i<WIDTH; i++) - { - int k=pixel_color[i][j]/3; - int l=pixel_color[i][j] - 3*k; - int m=0; - if (l==2) {l=1; m=1;} - printf(\"%%c%%c%%c\", k, k+l, k+m); - } -} +#include <stdlib.h>\n\ +#include <stdio.h>\n\ +#include <math.h>\n\ +\n\ +#define PI 3.14159265358979\n\ +#define COLORDEPTH %d\n\ +#define COLOREXTEN %d\n\ +#define WIDTH %s\n\ +#define HEIGHT %s\n\ +\n\ +typedef double point[3];\n\ +\n\ +typedef void (*BFunction)();\n\ +typedef double (*ZFunction)(double x, double y);\n\ +typedef void (*PFunction)(point p, double x, double y);\n\ +\n\ +const double CONV_RAD=M_PI/180;\n\ +int do_init = 1;\n\ +short int pixel_color[WIDTH][HEIGHT];\n\ +double x_1=%s, x_2=%s, y_1=%s, y_2=%s, z_1=%s, z_2=%s;\n\ +double ratio_x, ratio_y, ratio_z;\n\ +double m_rot[12]={1,0,0,0,0,1,0,0,0,0,1,0};\n\ +\n\ +double max(double x, double y)\n\ +{\n\ + if(x>=y) return x; else return y;\n\ +}\n\ +\n\ +double min(double x, double y)\n\ +{\n\ + if(x>=y) return x; else return y;\n\ +}\n\ +\n\ +void do_init_image()\n\ +{\n\ +int i,j;\n\ +\n\ + if (do_init)\n\ + {\n\ + for(j=0; j<HEIGHT; j++) for(i=0; i<WIDTH; i++) pixel_color[i][j] = 0;\n\ + ratio_x = (x_2-x_1)/(double)WIDTH;\n\ + ratio_y = (y_2-y_1)/(double)HEIGHT;\n\ + if(ratio_x==0 || ratio_y==0) exit(1);\n\ + ratio_z = z_2-z_1;\n\ + if(ratio_z<=0) exit(1); else ratio_z = ((double)COLOREXTEN)/ratio_z;\n\ + do_init = 0;\n\ + }\n\ +}\n\ +\n\ +void translation(double a, double b, double c)\n\ +{\n\ + m_rot[3] = a; \n\ + m_rot[7] = b; \n\ + m_rot[11] = c; \n\ +}\n\ +\n\ +void scale(double a)\n\ +{\n\ +int i;\n\ +\n\ + for (i=0; i<=11; i++) m_rot[i] *= a; \n\ +}\n\ +\n\ +void rotation_angles(double theta, double phi, double psi)\n\ +{\n\ +double ca,cb,cc, sa,sb,sc;\n\ +\n\ + ca=theta*CONV_RAD;\n\ + cb=phi*CONV_RAD;\n\ + cc=psi*CONV_RAD;\n\ +\n\ + sa=sin(ca); ca=cos(ca);\n\ + sb=sin(cb); cb=cos(cb);\n\ + sc=sin(cc); cc=cos(cc);\n\ +\n\ + m_rot[0] = ca*cb;\n\ + m_rot[1] = -sa*cc-ca*sb*sc;\n\ + m_rot[2] = sa*sc-ca*sb*cc;\n\ +\n\ + m_rot[4] = sa*cb;\n\ + m_rot[5] = ca*cc-sa*sb*sc;\n\ + m_rot[6] = -ca*sc-sa*sb*cc;\n\ +\n\ + m_rot[8] = sb;\n\ + m_rot[9] = cb*sc;\n\ + m_rot[10]= cb*cc;\n\ +\n\ +}\n\ +\n\ +void rotate(point p, point q)\n\ +{\n\ +int i,j;\n\ + for(i=0; i<=2; i++)\n\ + {\n\ + j=4*i;\n\ + q[i] = m_rot[j]*p[0]+m_rot[j+1]*p[1]+m_rot[j+2]*p[2]+m_rot[j+3];\n\ + }\n\ +}\n\ +\n\ +void setpoint(point p, point q)\n\ +{\n\ +int i;\n\ +\n\ + for(i=0; i<=2; i++) p[i] = q[i];\n\ +}\n\ +\n\ +void mesh(point *p, int h, int i, int j)\n\ +{\n\ +point a[3];\n\ +double ca,cb,cc,cd, delta, s,t, adds,addt, x, y, z, z0,z1,z2;\n\ +int u1, u2, v1, v2;\n\ +int k,l,m;\n\ +\n\ + do_init_image();\n\ + rotate(p[h],a[0]);\n\ + rotate(p[i],a[1]);\n\ + rotate(p[j],a[2]);\n\ +\n\ + u1=WIDTH; u2=-1;\n\ + v1=HEIGHT; v2=-1;\n\ +\n\ + for(k=0; k<=2; k++)\n\ + {\n\ + l=(int)((a[k][0]-x_1)/ratio_x);\n\ + if(l<u1) u1=l;\n\ + if(l>u2) u2=l;\n\ + l=(int)((y_2-a[k][1])/ratio_y);\n\ + if(l<v1) v1=l;\n\ + if(l>v2) v2=l;\n\ + }\n\ +\n\ + if(u1<0) u1=0;\n\ + if(u2>=WIDTH) u2=WIDTH-1;\n\ + if(v1<0) v1=0;\n\ + if(v2>=HEIGHT) v2=HEIGHT-1;\n\ + if(u1>u2 || v1>v2) return;\n\ +\n\ + z0 = a[0][2];\n\ + z1 = a[1][2]-z0;\n\ + z2 = a[2][2]-z0;\n\ +\n\ + z0 = (z0-z_1)*ratio_z;\n\ + z1 = z1*ratio_z;\n\ + z2 = z2*ratio_z;\n\ +\n\ + delta = (a[1][0]-a[0][0])*(a[2][1]-a[0][1]) \n\ + - (a[1][1]-a[0][1])*(a[2][0]-a[0][0]);\n\ + if (fabs(delta)<1E-5) return;\n\ + \n\ + delta=1/delta;\n\ + ca = (a[2][1]-a[0][1])*delta;\n\ + cb = (a[0][0]-a[2][0])*delta;\n\ + cc = (a[0][1]-a[1][1])*delta;\n\ + cd = (a[1][0]-a[0][0])*delta;\n\ + adds = ca*ratio_x;\n\ + addt = cc*ratio_x;\n\ +\n\ + for(l=v1; l<=v2; l++) \n\ + {\n\ + x = x_1 + u1*ratio_x - a[0][0];\n\ + y = y_2 - l*ratio_y - a[0][1];\n\ + s = ca*x + cb*y;\n\ + t = cc*x + cd*y;\n\ + for(k=u1; k<=u2; k++)\n\ + {\n\ + if (s>=-0.0001 && t>=-0.0001 && s+t<=1.0001)\n\ + {\n\ + m = (int) (z0 + s*z1 + t*z2);\n\ + if (m<0) m=0;\n\ + if (m>COLOREXTEN) m=COLOREXTEN;\n\ + if (m>pixel_color[k][l]) pixel_color[k][l] = m;\n\ + }\n\ + s = s + adds;\n\ + t = t + addt;\n\ + }\n\ + }\n\ +}\n\ +\n\ +void build(BFunction bfunct)\n\ +{\n\ + do_init_image();\n\ + bfunct();\n\ +}\n\ +\n\ +void light(ZFunction zfunct)\n\ +{\n\ +int i, j;\n\ +int k;\n\ +double x,y;\n\ +\n\ + do_init_image();\n\ +\n\ + for(j=0; j<HEIGHT; j++) \n\ + {\n\ + y = y_2-ratio_y*j;\n\ + for(i=0; i<WIDTH; i++)\n\ + {\n\ + x = ratio_x*i+x_1;\n\ + k = (int)((zfunct(x,y)-z_1)*ratio_z);\n\ + if (k<0) k=0;\n\ + if (k>COLOREXTEN) k=COLOREXTEN;\n\ + if (k>pixel_color[i][j]) pixel_color[i][j] = k;\n\ + }\n\ + }\n\ +}\n\ +\n\ +void graph(PFunction pfunct, double xi, double xs, int nx, \n\ + double yi, double ys, int ny)\n\ +{\n\ +int i, j, l;\n\ +double hx,hy;\n\ +point p[4];\n\ +\n\ + if(nx<=0 || ny<=0) return;\n\ +\n\ + do_init_image();\n\ +\n\ + hx = (xs-xi)/nx;\n\ + hy = (ys-yi)/ny;\n\ +\n\ + for(j=0; j<ny; j++) \n\ + {\n\ + for(l=0; l<=1; l++)\n\ + pfunct(p[l],xi,yi+(j+l)*hy);\n\ +\n\ + for(i=1; i<=nx; i++)\n\ + {\n\ + setpoint(p[2],p[0]); setpoint(p[3],p[1]); \n\ + for(l=0; l<=1; l++)\n\ + pfunct(p[l], xi+i*hx,yi+(j+l)*hy);\n\ + mesh(p,0,1,2); mesh(p,1,2,3);\n\ + }\n\ + }\n\ +}\n\ +\n\ +int main(int argc, char **argv)\n\ +{\n\ +int i, j;\n\ +\n\ + %s\n\ +\n\ + printf(\"P6\\n# CREATOR: sis\\n\");\n\ + printf(\" %%d %%d %%d\\n\", WIDTH, HEIGHT, COLORDEPTH);\n\ +\n\ + for(j=0; j<HEIGHT; j++) for(i=0; i<WIDTH; i++)\n\ + {\n\ + int k=pixel_color[i][j]/3;\n\ + int l=pixel_color[i][j] - 3*k;\n\ + int m=0;\n\ + if (l==2) {l=1; m=1;}\n\ + printf(\"%%c%%c%%c\", k, k+l, k+m);\n\ + }\n\ +}\n\ ", COLORDEPTH, COLOREXTEN,
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