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coloring & render order

This commit is contained in:
amy 2023-05-11 12:24:59 +00:00
parent ed3a5b83f3
commit 286e9ca2af
1 changed files with 156 additions and 49 deletions
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205
src/point.c
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@ -116,8 +116,8 @@ static const char* fshader_src =
"in float ntrans;\n"
"out vec4 color;\n"
"void main(){\n"
"gl_FragColor = vec4(1.0,0.0,1.0,1.0);\n"
//"gl_FragColor = vec4(ncolor,1.0);\n"
//"gl_FragColor = vec4(1.0,0.0,1.0,1.0);\n"
"gl_FragColor = vec4(ncolor,1.0);\n"
"};";
point_arr* basier2d(double*xx,double*yy,int n,float rr, float gg, float bb){
@ -172,9 +172,13 @@ typedef struct {
GLfloat* pix;
GLfloat* col;
GLfloat* trans;
GLfloat* tricol;
int len;
GLfloat* tri;
int tlen;
//double depth;
cord max;
cord min;
} glfl_ar;
void render_p(glfl_ar* bba){
//glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC1_ALPHA);
@ -202,7 +206,7 @@ void render_p(glfl_ar* bba){
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER,vetb);
glVertexAttribPointer(0,2,GL_FLOAT,GL_FALSE,0,(void*)0);
/*
GLuint colb;
glGenBuffers(1,&colb);
glBindBuffer(GL_ARRAY_BUFFER,colb);
@ -211,8 +215,18 @@ void render_p(glfl_ar* bba){
glEnableVertexAttribArray(1);
glBindBuffer(GL_ARRAY_BUFFER,colb);
glVertexAttribPointer(1,3,GL_FLOAT,GL_FALSE,0,(void*)0);
*/
GLuint colb;
glGenBuffers(1,&colb);
glBindBuffer(GL_ARRAY_BUFFER,colb);
glBufferData(GL_ARRAY_BUFFER,sizeof(*bba->tricol)*(bba->tlen*30),bba->tricol,GL_STATIC_DRAW);
GLuint trab;
glEnableVertexAttribArray(1);
glBindBuffer(GL_ARRAY_BUFFER,colb);
glVertexAttribPointer(1,3,GL_FLOAT,GL_FALSE,0,(void*)0);
GLuint trab;
glGenBuffers(1,&trab);
glBindBuffer(GL_ARRAY_BUFFER,trab);
glBufferData(GL_ARRAY_BUFFER,sizeof(*bba->trans)*(bba->len*2),bba->trans,GL_STATIC_DRAW);
@ -233,7 +247,8 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
GLfloat* trans = malloc(sizeof(*trans)*((1+c->len)*2));
if(pixels==NULL||colors==NULL||trans==NULL)
err("failed to allocate perspective array:(",pexit);
double dep = 0.0;
double depy = 0.0;
double coy = cos(cty);
double sinz = sin(ctz);
double coz = cos(ctz);
@ -246,11 +261,21 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
refresh_size(b);
GLuint fb = 0;
int c_len = 0;
//double ez=1/tan(fov/2); //i dont get this at all
double ez=get_w()*2;
//double ez=1/tan(fov/2); //i dont get this at all
double ez=get_w();
//printf("---\n");
glEnableClientState(GL_VERTEX_ARRAY);
for(int i = 0; i!=c->len; i++){
cord maxf;
cord minf;
maxf.x = -INFINITY;
maxf.y = -INFINITY;
maxf.z = -INFINITY;
minf.x = INFINITY;
minf.y = INFINITY;
minf.z = INFINITY;
for(int i = 0; i!=c->len; i++){
double ax = c->c[i].at.x;
double ay = c->c[i].at.y;
double az = c->c[i].at.z;
@ -262,8 +287,18 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
double dz = cox * yzm - six*eyz;
double bx = ez/dz*dx+dx;
double by = ez/dz*dy+dy;
if(dz>=0){
double by = ez/dz*dy+dy;
maxf.z = greater(maxf.z,dz);
minf.z = lesser(minf.z,dz);
maxf.x = greater(maxf.x,bx);
minf.x = lesser(minf.x,bx);
maxf.y = greater(maxf.y,by);
minf.y = lesser(minf.y,by);
if(dz>=0){
//printf("-- %f\n",dz);
//if(dz>dep) dep = dz;
ab_to_vp(xa,ya,get_w(),get_h(),bx,by);
pixels[c_len*2] = xa+1;
pixels[c_len*2+1] = ya;
@ -274,6 +309,7 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
c_len++;
}
}
//printf("%f\n",dep);
int fc_len = c_len;
/*
for(int i = 0; 0&&i<=fc_len-1; i++){
@ -451,17 +487,18 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
}*/
//printf("%i\n",trline->len);
GLfloat* tria = malloc(sizeof(*tria)*fc_len*2*6);
GLfloat* tricol = malloc(sizeof(*tricol)*fc_len*3*9);
int tric = 0;
//double ffclen = c_len;
double lmax_t = -2222.0;
double lmin_t = 2222.0;
double lmax2_t = -2222.0;
double lmin2_t = 2222.0;
double lmax_t = -INFINITY;
double lmin_t = INFINITY;
double lmax2_t = -INFINITY;
double lmin2_t = INFINITY;
for(int zzi = 0; zzi<trline->len; zzi++){
double max_t = -2222.0;
double min_t = 2222.0;
double max2_t = -2222.0;
double min2_t = 2222.0;
double max_t = -INFINITY;
double min_t = INFINITY;
double max2_t = -INFINITY;
double min2_t = INFINITY;
for(int zzi2 = 0; zzi2<trline->at[zzi].len;zzi2++){
if(max_t<trline->at[zzi].at[zzi2*2]){
max_t = trline->at[zzi].at[zzi2*2];
@ -478,7 +515,7 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
if (trline->at[zzi].len == 0)
continue;
if(lmax2_t!=max2_t&&lmin_t!=2222.0&&lmax_t!=-2222.0){
if(lmax2_t!=max2_t&&lmin_t!=INFINITY&&lmax_t!=-INFINITY){
float color = (float)zzi/trline->len;
float color2 = 1.0f-((float)zzi/trline->len);
@ -572,6 +609,18 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
tria[tric*6+3] = aacc->c[paaa].at.y;
tria[tric*6+4] = ix2;
tria[tric*6+5] = iy2;
//printf("%i %f %f\n",zzi,c->len,pixels[zzi*3]);
tricol[tric*9] = colors[zzi*3];
tricol[tric*9+1]=colors[zzi*3+1];
tricol[tric*9+2]=colors[zzi*3+2];
tricol[tric*9+3] =colors[zzi*3];
tricol[tric*9+4]= colors[zzi*3+1];
tricol[tric*9+5]= colors[zzi*3+2];
tricol[tric*9+6] =colors[zzi*3];
tricol[tric*9+7]= colors[zzi*3+1];
tricol[tric*9+8]= colors[zzi*3+2];
tric++;
//printf("%f %f, %f %f, %f %f, %f %f\n",x1,y1,x2,y2,ix1,iy1,ix2,iy2);
@ -581,7 +630,20 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
tria[tric*6+3] = aacc->c[paaa].at.y;
tria[tric*6+4] = ix1;
tria[tric*6+5] = iy1;
tricol[tric*9] = colors[zzi*3];
tricol[tric*9+1]=colors[zzi*3+1];
tricol[tric*9+2]=colors[zzi*3+2];
tricol[tric*9+3] =colors[zzi*3];
tricol[tric*9+4]= colors[zzi*3+1];
tricol[tric*9+5]= colors[zzi*3+2];
tricol[tric*9+6] =colors[zzi*3];
tricol[tric*9+7]= colors[zzi*3+1];
tricol[tric*9+8]= colors[zzi*3+2];
tric++;
break;
}
@ -601,8 +663,11 @@ glfl_ar* perspective_proj(GLFWwindow* b,point_arr* c,double ctx,double cty,doubl
glfl_ar* rea = malloc(sizeof(*rea));
rea->tlen = tric;
rea->tri = tria;
//rea->depth = dep;
rea->max = maxf;
rea->min = minf;
//printf(" %i\n",tric);
rea->tricol = tricol;
rea->col = colors;
rea->pix = pixels;
rea->len = c_len;
@ -680,6 +745,7 @@ void join_glfl_a(glfl_ar* a, glfl_ar* b){
a->col = realloc(a->col,sizeof(*a->col)*(a->len+b->len+1)*20);
a->trans = realloc(a->trans,sizeof(*a->trans)*(a->len+b->len+1)*20);
a->tri = realloc(a->tri,sizeof(*a->tri)*(a->tlen+b->tlen+1)*60);
a->tricol = realloc(a->tricol,sizeof(*a->tricol)*(a->tlen+b->tlen+1)*30);
a->len+=b->len;
a->tlen+=b->tlen;
if(a->tri==NULL||a->pix==NULL||a->col==NULL||a->trans==NULL)
@ -695,9 +761,12 @@ void join_glfl_a(glfl_ar* a, glfl_ar* b){
}
for(int i = 0; i<=b->tlen*6; i++){
a->tri[a_tlen*6+i] = b->tri[i];
}
for(int i = 0; i<=b->tlen*9; i++){
a->tricol[a_tlen*9+i] = b->tricol[i];
}
}
point_arr* polygon3d(double* vx, double*vy, double* vz, int n){
point_arr* polygon3d(double* vx, double*vy, double* vz, int n,float r, float g, float b){
/*double xx[2] = {vx[0],vx[1]};
double yy[2] = {vy[0],vy[1]};
double zz[2] = {vz[0],vz[1]};
@ -729,9 +798,9 @@ point_arr* polygon3d(double* vx, double*vy, double* vz, int n){
pa->vert[i].at.y = vy[i];
pa->vert[i].at.z = vz[i];
pa->c[i].color.r = 0.1f;
pa->c[i].color.g = 0.1f;
pa->c[i].color.b = 1.0f;
pa->c[i].color.r = r;
pa->c[i].color.g = g;
pa->c[i].color.b = b;
}
pa->len = n;
pa->vlen= n;
@ -741,22 +810,22 @@ point_arr* square_gen(double* tl, double* tr, double* bl, double*br,float rr, fl
double xx[3] = {tl[0],tr[0]};
double yy[3] = {tl[1],tr[1]};
double zz[3] = {tl[2],tr[2]};
point_arr* a = polygon3d(xx,yy,zz,2);
point_arr* a = polygon3d(xx,yy,zz,2,rr,gg,bb);
double xx1[3] = {tl[0],bl[0]};
double yy1[3] = {tl[1],bl[1]};
double zz1[3] = {tl[2],bl[2]};
point_arr* b = polygon3d(xx1,yy1,zz1,2);
point_arr* b = polygon3d(xx1,yy1,zz1,2,rr,gg,bb);
double xx2[3] = {tr[0],br[0]};
double yy2[3] = {tr[1],br[1]};
double zz2[3] = {tr[2],br[2]};
point_arr* c = polygon3d(xx2,yy2,zz2,2);
point_arr* c = polygon3d(xx2,yy2,zz2,2,rr,gg,bb);
double xx3[3] = {bl[0],br[0]};
double yy3[3] = {bl[1],br[1]};
double zz3[3] = {bl[2],br[2]};
point_arr* d = polygon3d(xx3,yy3,zz3,2);
point_arr* d = polygon3d(xx3,yy3,zz3,2,rr,gg,bb);
join_cords(a,b);
join_cords(a,c);
@ -867,14 +936,14 @@ point_m* rect3d_gen(double* tl, double* tr, double* bl, double*br,
double xx1[5]={tl[0],tr[0],br[0],bl[0], tl[0]};
double yy1[5]={tl[1],tr[1],br[1],bl[1], tl[1]};
double zz1[5]={tl[2],tr[2],br[2],bl[2], tl[2]};
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6);
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6,1.0,0.0,0.0);
mm->len++;
}
{
double xx1[5]={tl2[0],tr2[0],br2[0],bl2[0], tl2[0]};
double yy1[5]={tl2[1],tr2[1],br2[1],bl2[1], tl2[1]};
double zz1[5]={tl2[2],tr2[2],br2[2],bl2[2], tl2[2]};
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6);
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6,0.5,0.5,0.0);
mm->len++;
}
@ -882,14 +951,14 @@ point_m* rect3d_gen(double* tl, double* tr, double* bl, double*br,
double xx1[5]={tl2[0],tr2[0],tr[0],tl[0], tl2[0]};
double yy1[5]={tl2[1],tr2[1],tr[1],tl[1], tl2[1]};
double zz1[5]={tl2[2],tr2[2],tr[2],tl[2], tl2[2]};
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6);
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6,0.0,1.0,0.0);
mm->len++;
}
{
double xx1[5]={bl2[0],br2[0],br[0],bl[0], bl2[0]};
double yy1[5]={bl2[1],br2[1],br[1],bl[1], bl2[1]};
double zz1[5]={bl2[2],br2[2],br[2],bl[2], bl2[2]};
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6);
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6,0.0,0.5,0.5);
mm->len++;
}
@ -897,14 +966,14 @@ point_m* rect3d_gen(double* tl, double* tr, double* bl, double*br,
double xx1[5]={tl2[0],bl2[0],bl[0],tl[0], tl2[0]};
double yy1[5]={tl2[1],bl2[1],bl[1],tl[1], tl2[1]};
double zz1[5]={tl2[2],bl2[2],bl[2],tl[2], tl2[2]};
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6);
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6,0.0,0.0,0.1);
mm->len++;
}
{
double xx1[5]={tr2[0],br2[0],br[0],tr[0], tr2[0]};
double yy1[5]={tr2[1],br2[1],br[1],tr[1], tr2[1]};
double zz1[5]={tr2[2],br2[2],br[2],tr[2], tr2[2]};
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6);
mm[mm->len].at = polygon3d(xx1,yy1,zz1,6,0.3,0.3,0.3);
mm->len++;
}
return mm;
@ -938,7 +1007,7 @@ int main(int argc,char*argv[]){
double bl2[3] = {5.0,5.0,5.0};
double br2[3] = {200.0,5.0,5.0};
float rr = 0.0;
float gg = 0.0;
float gg = 0.5;
float bb = 1.0;
point_m* aaaa = rect3d_gen(tl,tr,bl,br,tl2,tr2,bl2,br2,rr,gg,bb);
//*/
@ -981,25 +1050,63 @@ int main(int argc,char*argv[]){
double p6 = pl_x;
if(aaaa->len>=0){
glfl_ar**con = malloc(sizeof **con * aaaa->len);
glfl_ar* bba = perspective_proj(w,aaaa[0].at,p1,p2,p3,p4,p5,p6);
con[0] = bba;
if(aaaa->len>0){
for(int i = 1; i<=aaaa->len-1; i++){
glfl_ar* bbb = perspective_proj(w,aaaa[i].at,p1,p2,p3,p4,p5,p6);
join_glfl_a(bba,bbb);
free(bbb->col);
free(bbb->pix);
free(bbb->trans);
free(bbb->tri);
free(bbb);
//printf("%f\n",bbb->depth);
con[i] = bbb;
//join_glfl_a(bba,bbb);
//free(bbb->col);
//free(bbb->pix);
//free(bbb->trans);
//free(bbb->tri);
//free(bbb->tricol);
//free(bbb);
}
}
render_p(bba);
free(bba->tri);
free(bba->trans);
free(bba->col);
free(bba->pix);
free(bba);
for(int i = 0; i<=aaaa->len-2; i++){
//printf("%i %i\n",i,aaaa->len-1);
if(con[i]->max.z<con[i+1]->min.z||
con[i]->min.z<con[i+1]->min.z||
con[i]->max.z<con[i+1]->max.z){
glfl_ar* tempp = con[i];
con[i] = con[i+1];
con[i+1] = tempp;
i=-1;
}
}
glfl_ar* push = con[0];
for(int i = 1; i<=aaaa->len-1;i++){
//printf("%f %f\n",con[i]->max.x,con[i]->min.x);
join_glfl_a(push,con[i]);
free(con[i]->tri);
free(con[i]->tricol);
free(con[i]->pix);
free(con[i]->col);
free(con[i]->trans);
free(con[i]);
}
render_p(push);
free(con[0]->tri);
free(con[0]->tricol);
free(con[0]->pix);
free(con[0]->col);
free(con[0]->trans);
free(con[0]);
free(con);
//free(bba->tricol);
//free(bba->tri);
//free(bba->trans);
//free(bba->col);
//free(bba->pix);
//free(bba);
}
glfw_load(w);