用c++敲出个玫瑰花
来和老苟玩耍吧:
float depth = start;
for (int i = 0; i < max_iterations; i++) {
float dist = map(add3(origin, scale3(dir, depth)));
if (dist < stop_threshold)
return depth;
depth += dist * 0.3;
if (depth >= end)
return end;
}
return end;
}
float shading(vec3 v, vec3 n, vec3 eye) {
vec3 ev = normalize3(sub3(v, eye));
vec3 vl = normalize3(sub3(light_pos, v));
float diffuse = dot3(vl, n) * 0.5f + 0.5f;
vec3 h = normalize3(sub3(vl, ev));
float rim = pow(1.0f - max(-dot3(n, ev), 0.0f), 2.0f) * 0.15f;
float ao = clamp(v.y * 0.5f + 0.5f, 0.0f, 1.0f);
return (diffuse + rim) * ao;
}
vec3 ray_dir(float fov, vec2 pos) {
vec3 r = { pos.x, pos.y, -tan((90.0f - fov * 0.5f) * DEG_TO_RAD) };
return normalize3(r);
}
float f(vec2 fragCoord) {
vec3 dir = ray_dir(45.0f, fragCoord);
vec3 eye = { 0.0f, 0.0f, 4.5f };
mat3 rot = rotat
【回复】代码没发全啊，主函数位置都没有
【回复】回复 @玖霄龙吟風雲啸 :【玫瑰花代码-哔哩哔哩】 https://b23.tv/VwSc0cm来和老苟玩耍吧:
#include <math.h>
#include<windows.h>
const int max_iterations = 128;
const float stop_threshold = 0.01f;
const float grad_step = 0.01f;
const float clip_far = 10.0f;
const float PI = 3.14159265359f;
const float PI2 = 6.28318530718f;
const float DEG_TO_RAD = PI / 180.0f;
typedef struct { float x, y; } vec2;
typedef struct { float x, y, z; } vec3;
typedef struct { float m【9】; } mat3;
const vec3 light_pos = { 20.0f, 50.0f, 20.0f };
【回复】回复 @晚霞期待与你 :这个括号vc里面没有吧
【回复】@来和老苟玩耍吧 之前我也曾经复制粘贴过这个代码，但是显示有bug,我把PI/180.0f改成3.14159265359f/180.0f就没有bug了，最后也画出来了，但能给我解释一下为什么吗？[保佑][保佑]来和老苟玩耍吧:
float min(float a, float b) { return a < b ? a : b; }
float max(float a, float b) { return a > b ? a : b; }
float clamp(float f, float a, float b) { return max(min(f, b), a); }
vec2 make2(float x, float y) { vec2 r = { x, y }; return r; }
vec2 add2(vec2 a, vec2 b) { vec2 r = { a.x + b.x, a.y + b.y }; return r; }
vec2 sub2(vec2 a, vec2 b) { vec2 r = { a.x - b.x, a.y - b.y }; return r; }
float dot2(vec2 a, vec2 b) { return a.x * b.x + a.y * b.y; }
float length2(vec2 v) { return sqrt(dot2(v, v)); }
vec3 make3(float x, float y, float z) { vec3 r = { x, y, z };
【回复】这确定后面没少代码？？
高宇航zs:
float depth = start;
for (int i = 0; i < max_iterations; i++) {
float dist = map(add3(origin, scale3(dir, depth)));
if (dist < stop_threshold)
return depth;
depth += dist * 0.3;
if (depth >= end)
return end;
}
return end;
}
float shading(vec3 v, vec3 n, vec3 eye) {
vec3 ev = normalize3(sub3(v, eye));
vec3 vl = normalize3(sub3(light_pos, v));
float diffuse = dot3(vl, n) * 0.5f + 0.5f;
vec3 h = normalize3(sub3(vl, ev));
float rim = pow(1.0f - max(-dot3(n, ev), 0.0f), 2.0f) * 0.15f;
float ao = clamp(v.y * 0.5f + 0.5f, 0.0f, 1.0f);
return (diffuse + rim) * ao;
}
vec3 ray_dir(float fov, vec2 pos) {
vec3 r = { pos.x, pos.y, -tan((90.0f - fov * 0.5f) * DEG_TO_RAD) };
return normalize3(r);
}
float f(vec2 fragCoord) {
vec3 dir = ray_dir(45.0f, fragCoord);
vec3 eye = { 0.0f, 0.0f, 4.5f };
mat3 rot = rotat
一眼万年の虎:
有一说一，要真是自己敲出来的真感觉挺牛的来和老苟玩耍吧:
float ray_marching(vec3 origin, vec3 dir, float start, float end) {
【回复】这，，确定是第三个？花括符包了什么？
【回复】回复 @来和老苟玩耍吧 : 只看到了123的代码，求uP 再发，谢谢哦
ここ_:
up和友友们这个错误怎么改呀，[爱心][爱心][爱心]
【回复】那三行vec3后面应该是 .dx
【回复】好的截屏，使我眼花缭乱（）
