mp2i-vms.fr
working on new drawing method
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obj/base.o
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obj/base.o
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obj/display.o
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obj/display.o
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59
src/base.c
59
src/base.c
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@ -297,6 +297,65 @@ double distance_pt_cube_3d(double x0, double y0, double z0, cube cb) {
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return distance_pt_cube_0_3d(x0, y0, z0, *cb) ;
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return distance_pt_cube_0_3d(x0, y0, z0, *cb) ;
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}
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}
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// ---------------- //
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double distance_seg_seg_1d(double s0, double e0, double s1, double e1) {
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double theta_s0 = -(((e1 - s1) * (s1 - s0)) / ((e1 - s1) * (e1 - s1)));
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double theta_e0 = -(((e1 - s1) * (s1 - e0)) / ((e1 - s1) * (e1 - s1)));
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if(
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(theta_s0 >= 0.0 && theta_s0 <= 1.0) || // s0 is in [s1, e1]
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(theta_e0 >= 0 && theta_e0 <= 1.0) || // s1 is in [s1, e1]
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(theta_s0 < 0.0 && theta_e0 > 1.0) || // inclusion
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(theta_e0 < 0.0 && theta_s0 > 1.0)) // inclusion
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{
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return 0.0;
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} else {
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double dist0 = mind(absf(theta_s0), absf(1.0 - theta_s0)) ;
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double dist1 = mind(absf(theta_e0), absf(1.0 - theta_e0)) ; // get the closest theta to [0, 1]
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return mind(dist1, dist0)*absf(e1 - s1);
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}
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}
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double distance_seg_seg_2d(
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double s0x, double s0y,
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double e0x, double e0y,
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double s1x, double s1y,
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double e1x, double e1y
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) {
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// basically ||.||_1
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return (
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distance_seg_seg_1d(s0x, e0x, s1x, e1x) +
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distance_seg_seg_1d(s0y, e0y, s1y, e1y)
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);
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}
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double distance_seg_seg_3d(
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double s0x, double s0y, double s0z,
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double e0x, double e0y, double e0z,
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double s1x, double s1y, double s1z,
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double e1x, double e1y, double e1z
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) {
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// same
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return (
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distance_seg_seg_1d(s0x, e0x, s1x, e1x) +
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distance_seg_seg_1d(s0y, e0y, s1y, e1y) +
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distance_seg_seg_1d(s0z, e0z, s1z, e1z)
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);
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}
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double distance_poly_poly_2d(pt_2d* t1, int len_1, pt_2d* t2, int len_2) {
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double res = 10000.0 ;
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for(int k1 = 0; k1 < len_1; k1++) {
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for(int k2 = 0; k2 < len_1; k2++) {
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res = mind(res, distance_seg_seg_2d(
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t1[k1].x, t1[k1].y, t1[(k1+1)%len_1].x, t1[(k1+1)%len_1].y,
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t2[k2].x, t2[k2].y, t2[(k2+1)%len_2].x, t2[(k2+1)%len_2].y
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));
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}
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}
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return res;
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}
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// ------------------------------------------------------------------------------------------------ //
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// ------------------------------------------------------------------------------------------------ //
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void remove_entity(entity** arr, int* memlen, int* len, int index) {
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void remove_entity(entity** arr, int* memlen, int* len, int index) {
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15
src/base.h
15
src/base.h
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@ -44,6 +44,21 @@ double distance_pt_cube_axis_max(double coord, double begin, double end);
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double distance_pt_cube_aligned_3d_max(double x0, double y0, double z0, double cx, double cy, double cz, double cw, double ch, double cd);
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double distance_pt_cube_aligned_3d_max(double x0, double y0, double z0, double cx, double cy, double cz, double cw, double ch, double cd);
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double distance_pt_cube_0_3d_max(double x0, double y0, double z0, cube_0 c);
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double distance_pt_cube_0_3d_max(double x0, double y0, double z0, cube_0 c);
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double distance_seg_seg_1d(double s0, double e0, double s1, double e1);
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double distance_seg_seg_2d(
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double s0x, double s0y,
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double e0x, double e0y,
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double s1x, double s1y,
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double e1x, double e1y
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);
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double distance_seg_seg_3d(
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double s0x, double s0y, double s0z,
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double e0x, double e0y, double e0z,
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double s1x, double s1y, double s1z,
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double e1x, double e1y, double e1z
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);
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double distance_poly_poly_2d(pt_2d* t1, int len_1, pt_2d* t2, int len_2);
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void remove_entity(entity** arr, int* memlen, int* len, int index);
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void remove_entity(entity** arr, int* memlen, int* len, int index);
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void add_entity(entity** arr, int* memlen, int* len, entity ent);
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void add_entity(entity** arr, int* memlen, int* len, entity ent);
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247
src/display.c
247
src/display.c
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@ -20,11 +20,17 @@
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#include "display.h"
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#include "display.h"
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int* drawOrder;
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int* drawOrder;
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int* drawOrder2;
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pt_2d* tri1 ;
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pt_2d* tri2 ;
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double draw_constant = 0.4 ;
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double draw_constant = 0.4 ;
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void init_draworder() {
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void init_draworder() {
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drawOrder = malloc(sizeof(int)*6) ;
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drawOrder = malloc(sizeof(int)*6) ;
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drawOrder2 = malloc(sizeof(int)*6) ;
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tri1 = malloc(sizeof(pt_2d)*6);
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tri2 = malloc(sizeof(pt_2d)*6);
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}
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}
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void updateRenderer(SDL_Renderer* renderer) {
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void updateRenderer(SDL_Renderer* renderer) {
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@ -437,6 +443,57 @@ int surfaceDrawOrder(double x0, double y0, double z0, cube_0 cb) {
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}
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}
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}
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}
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int surfaceDrawOrder2(double x0, double y0, double z0, cube_0 cb) {
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// returns the number of surfaces that should be drawn, as well as filling drawOrder2 for said surfaces :
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// 0 = +x ; 1 = -x
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// 2 = +y ; 3 = -y
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// 4 = +z ; 5 = -z
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// align cube center to (0, 0, 0)
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double x = x0 - (cb.x + cb.w/2.0) ;
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double y = y0 - (cb.y + cb.h/2.0) ;
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double z = z0 - (cb.z + cb.d/2.0) ;
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// rotate (y)
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double xry = x*cos(cb.hz_angle) + z*sin(cb.hz_angle) ;
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double yry = y ;
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double zry = z*cos(cb.hz_angle) - x*sin(cb.hz_angle) ;
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// rotate (x)
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double xrx = xry ;
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double yrx = yry*cos(cb.vt_angle) + zry*sin(cb.vt_angle) ;
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double zrx = zry*cos(cb.vt_angle) - yry*sin(cb.vt_angle) ;
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// cube is centered and aligned
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int id = 0 ;
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if(xrx > cb.w/2.0) {
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drawOrder2[id] = 0 ;
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id += 1 ;
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} else if(xrx < -cb.w/2.0) {
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drawOrder2[id] = 1 ;
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id += 1 ;
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}
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if(yrx > cb.h/2.0) {
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drawOrder2[id] = 2 ;
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id += 1 ;
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} else if(yrx < -cb.h/2.0) {
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drawOrder2[id] = 3 ;
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id += 1 ;
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}
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if(zrx > cb.d/2.0) {
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drawOrder2[id] = 4 ;
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id += 1 ;
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} else if(zrx < -cb.d/2.0) {
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drawOrder2[id] = 5 ;
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id += 1 ;
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}
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if(id == 0) { // inside the cube
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for(int k = 0; k < 6; k++) {
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drawOrder2[k] = k ;
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}
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return 6;
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} else {
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return id ;
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}
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}
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SDL_Vertex construct_vertex(double px, double py, int r, int g, int b) {
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SDL_Vertex construct_vertex(double px, double py, int r, int g, int b) {
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SDL_Vertex vtx ;
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SDL_Vertex vtx ;
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vtx.color.r = r ;
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vtx.color.r = r ;
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@ -581,6 +638,196 @@ void renderTriangle(
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}
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}
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}
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}
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pt_2d to_fpoint(double x0, double y0) {
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pt_2d res;
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res.x = x0;
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res.y = y0;
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return res;
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}
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int returnTriangle(
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double x0, double y0, double z0,
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double x1, double y1, double z1,
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double x2, double y2, double z2,
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pt_2d* retarr
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) {
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project_to_camera(x0, y0, z0, &px0, &py0, &pz0);
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project_to_camera(x1, y1, z1, &px1, &py1, &pz1);
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project_to_camera(x2, y2, z2, &px2, &py2, &pz2);
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if(pz0 >= draw_constant && pz1 >= draw_constant && pz2 >= draw_constant) {
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retarr[0] = to_fpoint(1500.0 * (1.0 + (px0 / (1.5 * pz0 * tan_fov))) / 2.0, 1000.0 * (1.0 + (py0 / (pz0 * tan_fov))) / 2.0);
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retarr[1] = to_fpoint(1500.0 * (1.0 + (px1 / (1.5 * pz1 * tan_fov))) / 2.0, 1000.0 * (1.0 + (py1 / (pz1 * tan_fov))) / 2.0);
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retarr[2] = to_fpoint(1500.0 * (1.0 + (px2 / (1.5 * pz2 * tan_fov))) / 2.0, 1000.0 * (1.0 + (py2 / (pz2 * tan_fov))) / 2.0);
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return 3;
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} else if((pz0 >= draw_constant) + (pz1 >= draw_constant) + (pz2 >= draw_constant) == 2) {
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if(pz0 < draw_constant) {
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// pz1 >= draw_constant and pz2 >+ draw_constant
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fpx0 = px1 ; fpy0 = py1 ; fpz0 = pz1 ;
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fpx1 = px2 ; fpy1 = py2 ; fpz1 = pz2 ;
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// 1-0 segment
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project_to_camera(
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convex_pt(x1, x0, (pz1 - draw_constant)/(pz1 - pz0)),
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convex_pt(y1, y0, (pz1 - draw_constant)/(pz1 - pz0)),
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convex_pt(z1, z0, (pz1 - draw_constant)/(pz1 - pz0)),
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&mpx0, &mpy0, &mpz0) ;
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// 0-2 segment
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project_to_camera(
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convex_pt(x2, x0, (pz2 - draw_constant)/(pz2 - pz0)),
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convex_pt(y2, y0, (pz2 - draw_constant)/(pz2 - pz0)),
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convex_pt(z2, z0, (pz2 - draw_constant)/(pz2 - pz0)),
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&mpx1, &mpy1, &mpz1) ;
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} else if(pz1 < draw_constant) {
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// pz0 >= draw_constant and pz2 >+ draw_constant
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fpx0 = px0 ; fpy0 = py0 ; fpz0 = pz0 ;
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fpx1 = px2 ; fpy1 = py2 ; fpz1 = pz2 ;
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// 0-1 segment
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project_to_camera(
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convex_pt(x0, x1, (pz0 - draw_constant)/(pz0 - pz1)),
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convex_pt(y0, y1, (pz0 - draw_constant)/(pz0 - pz1)),
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convex_pt(z0, z1, (pz0 - draw_constant)/(pz0 - pz1)),
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&mpx0, &mpy0, &mpz0) ;
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// 1-2 segment
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project_to_camera(
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convex_pt(x2, x1, (pz2 - draw_constant)/(pz2 - pz1)),
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convex_pt(y2, y1, (pz2 - draw_constant)/(pz2 - pz1)),
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convex_pt(z2, z1, (pz2 - draw_constant)/(pz2 - pz1)),
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&mpx1, &mpy1, &mpz1) ;
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} else /*if(pz2 < draw_constant)*/ {
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// pz1 >= draw_constant and pz0 >+ draw_constant
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fpx0 = px0 ; fpy0 = py0 ; fpz0 = pz0 ;
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fpx1 = px1 ; fpy1 = py1 ; fpz1 = pz1 ;
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// 0-2 segment
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project_to_camera(
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convex_pt(x0, x2, (pz0 - draw_constant)/(pz0 - pz2)),
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convex_pt(y0, y2, (pz0 - draw_constant)/(pz0 - pz2)),
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convex_pt(z0, z2, (pz0 - draw_constant)/(pz0 - pz2)),
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&mpx0, &mpy0, &mpz0) ;
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// 1-2 segment
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project_to_camera(
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convex_pt(x1, x2, (pz1 - draw_constant)/(pz1 - pz2)),
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convex_pt(y1, y2, (pz1 - draw_constant)/(pz1 - pz2)),
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convex_pt(z1, z2, (pz1 - draw_constant)/(pz1 - pz2)),
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&mpx1, &mpy1, &mpz1) ;
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}
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retarr[0] = to_fpoint(1500.0 * (1.0 + (fpx0 / (1.5 * fpz0 * tan_fov))) / 2.0, 1000.0 * (1.0 + (fpy0 / (fpz0 * tan_fov))) / 2.0);
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retarr[1] = to_fpoint(1500.0 * (1.0 + (mpx0 / (1.5 * mpz0 * tan_fov))) / 2.0, 1000.0 * (1.0 + (mpy0 / (mpz0 * tan_fov))) / 2.0);
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retarr[2] = to_fpoint(1500.0 * (1.0 + (fpx1 / (1.5 * fpz1 * tan_fov))) / 2.0, 1000.0 * (1.0 + (fpy1 / (fpz1 * tan_fov))) / 2.0);
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retarr[3] = to_fpoint(1500.0 * (1.0 + (mpx0 / (1.5 * mpz0 * tan_fov))) / 2.0, 1000.0 * (1.0 + (mpy0 / (mpz0 * tan_fov))) / 2.0);
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retarr[4] = to_fpoint(1500.0 * (1.0 + (mpx1 / (1.5 * mpz1 * tan_fov))) / 2.0, 1000.0 * (1.0 + (mpy1 / (mpz1 * tan_fov))) / 2.0);
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retarr[5] = to_fpoint(1500.0 * (1.0 + (fpx1 / (1.5 * fpz1 * tan_fov))) / 2.0, 1000.0 * (1.0 + (fpy1 / (fpz1 * tan_fov))) / 2.0);
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return 6;
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} else if((pz0 >= draw_constant) + (pz1 >= draw_constant) + (pz2 >= draw_constant) == 1) {
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if(pz0 >= draw_constant) {
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project_to_camera(
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convex_pt(x0, x1, (pz0 - draw_constant)/(pz0 - pz1)),
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convex_pt(y0, y1, (pz0 - draw_constant)/(pz0 - pz1)),
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convex_pt(z0, z1, (pz0 - draw_constant)/(pz0 - pz1)),
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&px1, &py1, &pz1);
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project_to_camera(
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convex_pt(x0, x2, (pz0 - draw_constant)/(pz0 - pz2)),
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convex_pt(y0, y2, (pz0 - draw_constant)/(pz0 - pz2)),
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convex_pt(z0, z2, (pz0 - draw_constant)/(pz0 - pz2)),
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&px2, &py2, &pz2);
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} else if(pz1 >= draw_constant) {
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project_to_camera(
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convex_pt(x1, x0, (pz1 - draw_constant)/(pz1 - pz0)),
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convex_pt(y1, y0, (pz1 - draw_constant)/(pz1 - pz0)),
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convex_pt(z1, z0, (pz1 - draw_constant)/(pz1 - pz0)),
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&px0, &py0, &pz0);
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project_to_camera(
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convex_pt(x1, x2, (pz1 - draw_constant)/(pz1 - pz2)),
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convex_pt(y1, y2, (pz1 - draw_constant)/(pz1 - pz2)),
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convex_pt(z1, z2, (pz1 - draw_constant)/(pz1 - pz2)),
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&px2, &py2, &pz2);
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} else if(pz2 >= draw_constant) {
|
||||||
|
project_to_camera(
|
||||||
|
convex_pt(x2, x0, (pz2 - draw_constant)/(pz2 - pz0)),
|
||||||
|
convex_pt(y2, y0, (pz2 - draw_constant)/(pz2 - pz0)),
|
||||||
|
convex_pt(z2, z0, (pz2 - draw_constant)/(pz2 - pz0)),
|
||||||
|
&px0, &py0, &pz0);
|
||||||
|
project_to_camera(
|
||||||
|
convex_pt(x2, x1, (pz2 - draw_constant)/(pz2 - pz1)),
|
||||||
|
convex_pt(y2, y1, (pz2 - draw_constant)/(pz2 - pz1)),
|
||||||
|
convex_pt(z2, z1, (pz2 - draw_constant)/(pz2 - pz1)),
|
||||||
|
&px1, &py1, &pz1);
|
||||||
|
}
|
||||||
|
|
||||||
|
retarr[0] = to_fpoint(1500.0 * (1.0 + (px0 / (1.5 * pz0 * tan_fov))) / 2.0, 1000.0 * (1.0 + (py0 / (pz0 * tan_fov))) / 2.0);
|
||||||
|
retarr[1] = to_fpoint(1500.0 * (1.0 + (px1 / (1.5 * pz1 * tan_fov))) / 2.0, 1000.0 * (1.0 + (py1 / (pz1 * tan_fov))) / 2.0);
|
||||||
|
retarr[2] = to_fpoint(1500.0 * (1.0 + (px2 / (1.5 * pz2 * tan_fov))) / 2.0, 1000.0 * (1.0 + (py2 / (pz2 * tan_fov))) / 2.0);
|
||||||
|
return 3;
|
||||||
|
} else {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int fillPolygon(int sf, cube_0 c, int trig, pt_2d* ret) {
|
||||||
|
// trig is either 0 or 1
|
||||||
|
// returns the length of the result
|
||||||
|
if(sf == 0 || sf == 1) { // x
|
||||||
|
if(trig == 0) {
|
||||||
|
return returnTriangle(
|
||||||
|
c.x + c.w*(sf==0), c.y, c.z,
|
||||||
|
c.x + c.w*(sf==0), c.y + c.h, c.z,
|
||||||
|
c.x + c.w*(sf==0), c.y + c.h, c.z + c.d,
|
||||||
|
ret
|
||||||
|
);
|
||||||
|
} else {
|
||||||
|
return returnTriangle(
|
||||||
|
c.x + c.w*(sf==0), c.y, c.z,
|
||||||
|
c.x + c.w*(sf==0), c.y, c.z + c.d,
|
||||||
|
c.x + c.w*(sf==0), c.y + c.h, c.z + c.d,
|
||||||
|
ret
|
||||||
|
);
|
||||||
|
}
|
||||||
|
}/* else if(sf == 2 || sf == 3) { // y
|
||||||
|
renderTriangleRotated(renderer,
|
||||||
|
c.x, c.y + c.h*(sf==2), c.z,
|
||||||
|
c.x + c.w, c.y + c.h*(sf==2), c.z,
|
||||||
|
c.x + c.w, c.y + c.h*(sf==2), c.z + c.d,
|
||||||
|
c.red, c.green, c.blue, c
|
||||||
|
);
|
||||||
|
renderTriangleRotated(renderer,
|
||||||
|
c.x, c.y + c.h*(sf==2), c.z,
|
||||||
|
c.x, c.y + c.h*(sf==2), c.z + c.d,
|
||||||
|
c.x + c.w, c.y + c.h*(sf==2), c.z + c.d,
|
||||||
|
c.red, c.green, c.blue, c
|
||||||
|
);
|
||||||
|
} else { // z
|
||||||
|
renderTriangleRotated(renderer,
|
||||||
|
c.x, c.y, c.z + c.d*(sf==4),
|
||||||
|
c.x + c.w, c.y, c.z + c.d*(sf==4),
|
||||||
|
c.x + c.w, c.y + c.h, c.z + c.d*(sf==4),
|
||||||
|
c.red, c.green, c.blue, c
|
||||||
|
);
|
||||||
|
renderTriangleRotated(renderer,
|
||||||
|
c.x, c.y, c.z + c.d*(sf==4),
|
||||||
|
c.x, c.y + c.h, c.z + c.d*(sf==4),
|
||||||
|
c.x + c.w, c.y + c.h, c.z + c.d*(sf==4),
|
||||||
|
c.red, c.green, c.blue, c
|
||||||
|
);
|
||||||
|
}*/
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
double is_overlapping(cube_0 c1, cube_0 c2) {
|
||||||
|
// 0 if no overlap >0 if c1 is in front of c2, <0 if c2 is in front of c1
|
||||||
|
int sfToDraw1 = surfaceDrawOrder(camx, camy, camz, c1);
|
||||||
|
int sfToDraw2 = surfaceDrawOrder2(camx, camy, camz, c2);
|
||||||
|
for(int k1 = 0; k1 < sfToDraw1; k1 ++) {
|
||||||
|
for(int k2 = 0; k2 < sfToDraw2; k2 ++) {
|
||||||
|
if(false/*isCollidingSfOfCube(drawOrder[k1], c1, drawOrder2[k2], c2)*/) {
|
||||||
|
return 1.0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return 0.0;
|
||||||
|
}
|
||||||
|
|
||||||
void renderTriangleRotated(
|
void renderTriangleRotated(
|
||||||
SDL_Renderer* renderer,
|
SDL_Renderer* renderer,
|
||||||
double x0, double y0, double z0,
|
double x0, double y0, double z0,
|
||||||
|
|
|
||||||
|
|
@ -6,6 +6,11 @@ typedef struct imgs {
|
||||||
SDL_Texture** arr;
|
SDL_Texture** arr;
|
||||||
} imgs ;
|
} imgs ;
|
||||||
|
|
||||||
|
typedef struct pt_2d {
|
||||||
|
double x;
|
||||||
|
double y;
|
||||||
|
} pt_2d ;
|
||||||
|
|
||||||
struct cube_0 {
|
struct cube_0 {
|
||||||
int red; int green; int blue ;
|
int red; int green; int blue ;
|
||||||
double x;
|
double x;
|
||||||
|
|
@ -107,4 +112,7 @@ extern int coins ;
|
||||||
|
|
||||||
extern int draw_type ;
|
extern int draw_type ;
|
||||||
|
|
||||||
|
extern pt_2d* tri1 ;
|
||||||
|
extern pt_2d* tri2 ;
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
Loading…
Reference in New Issue