diff --git a/examples/Makefile b/examples/Makefile index dce02218a..574975d23 100644 --- a/examples/Makefile +++ b/examples/Makefile @@ -523,7 +523,8 @@ SHADERS = \ shaders/shaders_hot_reloading \ shaders/shaders_mesh_instancing \ shaders/shaders_multi_sample2d \ - shaders/shaders_write_depth + shaders/shaders_write_depth \ + shaders/shaders_hybrid_render AUDIO = \ audio/audio_module_playing \ @@ -581,10 +582,10 @@ ifeq ($(PLATFORM),PLATFORM_DRM) rm -fv *.o endif ifeq ($(PLATFORM),PLATFORM_WEB) - ifeq ($(PLATFORM_OS),WINDOWS) + ifeq ($(PLATFORM_OS),WINDOWS) del *.wasm *.html *.js *.data - else + else rm -f */*.wasm */*.html */*.js */*.data - endif + endif endif @echo Cleaning done diff --git a/examples/shaders/resources/shaders/glsl100/hybrid_raster.fs b/examples/shaders/resources/shaders/glsl100/hybrid_raster.fs new file mode 100644 index 000000000..28188a454 --- /dev/null +++ b/examples/shaders/resources/shaders/glsl100/hybrid_raster.fs @@ -0,0 +1,16 @@ +#version 100 +#extension GL_EXT_frag_depth : enable // Extension required for writing depth +precision mediump float; // Precision required for OpenGL ES2 (WebGL) + +varying vec2 fragTexCoord; +varying vec4 fragColor; + +uniform sampler2D texture0; +uniform vec4 colDiffuse; + +void main() +{ + vec4 texelColor = texture2D(texture0, fragTexCoord); + gl_FragColor = texelColor*colDiffuse*fragColor; + gl_FragDepthEXT = gl_FragCoord.z; +} \ No newline at end of file diff --git a/examples/shaders/resources/shaders/glsl100/hybrid_raymarch.fs b/examples/shaders/resources/shaders/glsl100/hybrid_raymarch.fs new file mode 100644 index 000000000..6241186de --- /dev/null +++ b/examples/shaders/resources/shaders/glsl100/hybrid_raymarch.fs @@ -0,0 +1,288 @@ +#version 100 +#extension GL_EXT_frag_depth : enable //Extension required for writing depth +#extension GL_OES_standard_derivatives : enable //Extension used for fwidth() +precision mediump float; // Precision required for OpenGL ES2 (WebGL) + + +// Input vertex attributes (from vertex shader) +varying vec2 fragTexCoord; +varying vec4 fragColor; + +// Input uniform values +uniform sampler2D texture0; +uniform vec4 colDiffuse; + +// Custom Input Uniform +uniform vec3 camPos; +uniform vec3 camDir; +uniform vec2 screenCenter; + +#define ZERO 0 + +// https://learnopengl.com/Advanced-OpenGL/Depth-testing +float CalcDepth(in vec3 rd, in float Idist){ + float local_z = dot(normalize(camDir),rd)*Idist; + return (1.0/(local_z) - 1.0/0.01)/(1.0/1000.0 -1.0/0.01); +} + +// https://iquilezles.org/articles/distfunctions/ +float sdHorseshoe( in vec3 p, in vec2 c, in float r, in float le, vec2 w ) +{ + p.x = abs(p.x); + float l = length(p.xy); + p.xy = mat2(-c.x, c.y, + c.y, c.x)*p.xy; + p.xy = vec2((p.y>0.0 || p.x>0.0)?p.x:l*sign(-c.x), + (p.x>0.0)?p.y:l ); + p.xy = vec2(p.x,abs(p.y-r))-vec2(le,0.0); + + vec2 q = vec2(length(max(p.xy,0.0)) + min(0.0,max(p.x,p.y)),p.z); + vec2 d = abs(q) - w; + return min(max(d.x,d.y),0.0) + length(max(d,0.0)); +} + +// r = sphere's radius +// h = cutting's plane's position +// t = thickness +float sdSixWayCutHollowSphere( vec3 p, float r, float h, float t ) +{ + // Six way symetry Transformation + vec3 ap = abs(p); + if(ap.x < max(ap.y, ap.z)){ + if(ap.y < ap.z) ap.xz = ap.zx; + else ap.xy = ap.yx; + } + + vec2 q = vec2( length(ap.yz), ap.x ); + + float w = sqrt(r*r-h*h); + + return ((h*q.x0.0 ) + { + tmax = min( tmax, tp1 ); + res = vec2( tp1, 1.0 ); + } + + float t = tmin; + for( int i=0; i<70 ; i++ ) + { + if(t>tmax) break; + vec2 h = map( ro+rd*t ); + if( abs(h.x)<(0.0001*t) ) + { + res = vec2(t,h.y); + break; + } + t += h.x; + } + + return res; +} + + +// https://iquilezles.org/articles/rmshadows +float calcSoftshadow( in vec3 ro, in vec3 rd, in float mint, in float tmax ) +{ + // bounding volume + float tp = (0.8-ro.y)/rd.y; if( tp>0.0 ) tmax = min( tmax, tp ); + + float res = 1.0; + float t = mint; + for( int i=ZERO; i<24; i++ ) + { + float h = map( ro + rd*t ).x; + float s = clamp(8.0*h/t,0.0,1.0); + res = min( res, s ); + t += clamp( h, 0.01, 0.2 ); + if( res<0.004 || t>tmax ) break; + } + res = clamp( res, 0.0, 1.0 ); + return res*res*(3.0-2.0*res); +} + + +// https://iquilezles.org/articles/normalsSDF +vec3 calcNormal( in vec3 pos ) +{ + vec2 e = vec2(1.0,-1.0)*0.5773*0.0005; + return normalize( e.xyy*map( pos + e.xyy ).x + + e.yyx*map( pos + e.yyx ).x + + e.yxy*map( pos + e.yxy ).x + + e.xxx*map( pos + e.xxx ).x ); +} + +// https://iquilezles.org/articles/nvscene2008/rwwtt.pdf +float calcAO( in vec3 pos, in vec3 nor ) +{ + float occ = 0.0; + float sca = 1.0; + for( int i=ZERO; i<5; i++ ) + { + float h = 0.01 + 0.12*float(i)/4.0; + float d = map( pos + h*nor ).x; + occ += (h-d)*sca; + sca *= 0.95; + if( occ>0.35 ) break; + } + return clamp( 1.0 - 3.0*occ, 0.0, 1.0 ) * (0.5+0.5*nor.y); +} + +// https://iquilezles.org/articles/checkerfiltering +float checkersGradBox( in vec2 p ) +{ + // filter kernel + vec2 w = fwidth(p) + 0.001; + // analytical integral (box filter) + vec2 i = 2.0*(abs(fract((p-0.5*w)*0.5)-0.5)-abs(fract((p+0.5*w)*0.5)-0.5))/w; + // xor pattern + return 0.5 - 0.5*i.x*i.y; +} + +// https://www.shadertoy.com/view/tdS3DG +vec4 render( in vec3 ro, in vec3 rd) +{ + // background + vec3 col = vec3(0.7, 0.7, 0.9) - max(rd.y,0.0)*0.3; + + // raycast scene + vec2 res = raycast(ro,rd); + float t = res.x; + float m = res.y; + if( m>-0.5 ) + { + vec3 pos = ro + t*rd; + vec3 nor = (m<1.5) ? vec3(0.0,1.0,0.0) : calcNormal( pos ); + vec3 ref = reflect( rd, nor ); + + // material + col = 0.2 + 0.2*sin( m*2.0 + vec3(0.0,1.0,2.0) ); + float ks = 1.0; + + if( m<1.5 ) + { + float f = checkersGradBox( 3.0*pos.xz); + col = 0.15 + f*vec3(0.05); + ks = 0.4; + } + + // lighting + float occ = calcAO( pos, nor ); + + vec3 lin = vec3(0.0); + + // sun + { + vec3 lig = normalize( vec3(-0.5, 0.4, -0.6) ); + vec3 hal = normalize( lig-rd ); + float dif = clamp( dot( nor, lig ), 0.0, 1.0 ); + //if( dif>0.0001 ) + dif *= calcSoftshadow( pos, lig, 0.02, 2.5 ); + float spe = pow( clamp( dot( nor, hal ), 0.0, 1.0 ),16.0); + spe *= dif; + spe *= 0.04+0.96*pow(clamp(1.0-dot(hal,lig),0.0,1.0),5.0); + //spe *= 0.04+0.96*pow(clamp(1.0-sqrt(0.5*(1.0-dot(rd,lig))),0.0,1.0),5.0); + lin += col*2.20*dif*vec3(1.30,1.00,0.70); + lin += 5.00*spe*vec3(1.30,1.00,0.70)*ks; + } + // sky + { + float dif = sqrt(clamp( 0.5+0.5*nor.y, 0.0, 1.0 )); + dif *= occ; + float spe = smoothstep( -0.2, 0.2, ref.y ); + spe *= dif; + spe *= 0.04+0.96*pow(clamp(1.0+dot(nor,rd),0.0,1.0), 5.0 ); + //if( spe>0.001 ) + spe *= calcSoftshadow( pos, ref, 0.02, 2.5 ); + lin += col*0.60*dif*vec3(0.40,0.60,1.15); + lin += 2.00*spe*vec3(0.40,0.60,1.30)*ks; + } + // back + { + float dif = clamp( dot( nor, normalize(vec3(0.5,0.0,0.6))), 0.0, 1.0 )*clamp( 1.0-pos.y,0.0,1.0); + dif *= occ; + lin += col*0.55*dif*vec3(0.25,0.25,0.25); + } + // sss + { + float dif = pow(clamp(1.0+dot(nor,rd),0.0,1.0),2.0); + dif *= occ; + lin += col*0.25*dif*vec3(1.00,1.00,1.00); + } + + col = lin; + + col = mix( col, vec3(0.7,0.7,0.9), 1.0-exp( -0.0001*t*t*t ) ); + } + + return vec4(vec3( clamp(col,0.0,1.0) ),t); +} + +vec3 CalcRayDir(vec2 nCoord){ + vec3 horizontal = normalize(cross(camDir,vec3(.0 , 1.0, .0))); + vec3 vertical = normalize(cross(horizontal,camDir)); + return normalize(camDir + horizontal*nCoord.x + vertical*nCoord.y); +} + +mat3 setCamera() +{ + vec3 cw = normalize(camDir); + vec3 cp = vec3(0.0, 1.0 ,0.0); + vec3 cu = normalize( cross(cw,cp) ); + vec3 cv = ( cross(cu,cw) ); + return mat3( cu, cv, cw ); +} + +void main() +{ + vec2 nCoord = (gl_FragCoord.xy - screenCenter.xy)/screenCenter.y; + mat3 ca = setCamera(); + + // focal length + float fl = length(camDir); + vec3 rd = ca * normalize( vec3(nCoord,fl) ); + vec3 color = vec3(nCoord/2.0 + 0.5, 0.0); + float depth = gl_FragCoord.z; + { + vec4 res = render( camPos - vec3(0.0, 0.0, 0.0) , rd ); + color = res.xyz; + depth = CalcDepth(rd,res.w); + } + gl_FragColor = vec4(color , 1.0); + gl_FragDepthEXT = depth; +} \ No newline at end of file diff --git a/examples/shaders/resources/shaders/glsl330/hybrid_raster.fs b/examples/shaders/resources/shaders/glsl330/hybrid_raster.fs new file mode 100644 index 000000000..85ef492c0 --- /dev/null +++ b/examples/shaders/resources/shaders/glsl330/hybrid_raster.fs @@ -0,0 +1,14 @@ +#version 330 + +in vec2 fragTexCoord; +in vec4 fragColor; + +uniform sampler2D texture0; +uniform vec4 colDiffuse; + +void main() +{ + vec4 texelColor = texture2D(texture0, fragTexCoord); + gl_FragColor = texelColor*colDiffuse*fragColor; + gl_FragDepth = gl_FragCoord.z; +} \ No newline at end of file diff --git a/examples/shaders/resources/shaders/glsl330/hybrid_raymarch.fs b/examples/shaders/resources/shaders/glsl330/hybrid_raymarch.fs new file mode 100644 index 000000000..5b66dd71c --- /dev/null +++ b/examples/shaders/resources/shaders/glsl330/hybrid_raymarch.fs @@ -0,0 +1,284 @@ +# version 330 + +// Input vertex attributes (from vertex shader) +in vec2 fragTexCoord; +in vec4 fragColor; + +// Input uniform values +uniform sampler2D texture0; +uniform vec4 colDiffuse; + +// Custom Input Uniform +uniform vec3 camPos; +uniform vec3 camDir; +uniform vec2 screenCenter; + +#define ZERO 0 + +// https://learnopengl.com/Advanced-OpenGL/Depth-testing +float CalcDepth(in vec3 rd, in float Idist){ + float local_z = dot(normalize(camDir),rd)*Idist; + return (1.0/(local_z) - 1.0/0.01)/(1.0/1000.0 -1.0/0.01); +} + +// https://iquilezles.org/articles/distfunctions/ +float sdHorseshoe( in vec3 p, in vec2 c, in float r, in float le, vec2 w ) +{ + p.x = abs(p.x); + float l = length(p.xy); + p.xy = mat2(-c.x, c.y, + c.y, c.x)*p.xy; + p.xy = vec2((p.y>0.0 || p.x>0.0)?p.x:l*sign(-c.x), + (p.x>0.0)?p.y:l ); + p.xy = vec2(p.x,abs(p.y-r))-vec2(le,0.0); + + vec2 q = vec2(length(max(p.xy,0.0)) + min(0.0,max(p.x,p.y)),p.z); + vec2 d = abs(q) - w; + return min(max(d.x,d.y),0.0) + length(max(d,0.0)); +} + +// r = sphere's radius +// h = cutting's plane's position +// t = thickness +float sdSixWayCutHollowSphere( vec3 p, float r, float h, float t ) +{ + // Six way symetry Transformation + vec3 ap = abs(p); + if(ap.x < max(ap.y, ap.z)){ + if(ap.y < ap.z) ap.xz = ap.zx; + else ap.xy = ap.yx; + } + + vec2 q = vec2( length(ap.yz), ap.x ); + + float w = sqrt(r*r-h*h); + + return ((h*q.x0.0 ) + { + tmax = min( tmax, tp1 ); + res = vec2( tp1, 1.0 ); + } + + float t = tmin; + for( int i=0; i<70 ; i++ ) + { + if(t>tmax) break; + vec2 h = map( ro+rd*t ); + if( abs(h.x)<(0.0001*t) ) + { + res = vec2(t,h.y); + break; + } + t += h.x; + } + + return res; +} + + +// https://iquilezles.org/articles/rmshadows +float calcSoftshadow( in vec3 ro, in vec3 rd, in float mint, in float tmax ) +{ + // bounding volume + float tp = (0.8-ro.y)/rd.y; if( tp>0.0 ) tmax = min( tmax, tp ); + + float res = 1.0; + float t = mint; + for( int i=ZERO; i<24; i++ ) + { + float h = map( ro + rd*t ).x; + float s = clamp(8.0*h/t,0.0,1.0); + res = min( res, s ); + t += clamp( h, 0.01, 0.2 ); + if( res<0.004 || t>tmax ) break; + } + res = clamp( res, 0.0, 1.0 ); + return res*res*(3.0-2.0*res); +} + + +// https://iquilezles.org/articles/normalsSDF +vec3 calcNormal( in vec3 pos ) +{ + vec2 e = vec2(1.0,-1.0)*0.5773*0.0005; + return normalize( e.xyy*map( pos + e.xyy ).x + + e.yyx*map( pos + e.yyx ).x + + e.yxy*map( pos + e.yxy ).x + + e.xxx*map( pos + e.xxx ).x ); +} + +// https://iquilezles.org/articles/nvscene2008/rwwtt.pdf +float calcAO( in vec3 pos, in vec3 nor ) +{ + float occ = 0.0; + float sca = 1.0; + for( int i=ZERO; i<5; i++ ) + { + float h = 0.01 + 0.12*float(i)/4.0; + float d = map( pos + h*nor ).x; + occ += (h-d)*sca; + sca *= 0.95; + if( occ>0.35 ) break; + } + return clamp( 1.0 - 3.0*occ, 0.0, 1.0 ) * (0.5+0.5*nor.y); +} + +// https://iquilezles.org/articles/checkerfiltering +float checkersGradBox( in vec2 p ) +{ + // filter kernel + vec2 w = fwidth(p) + 0.001; + // analytical integral (box filter) + vec2 i = 2.0*(abs(fract((p-0.5*w)*0.5)-0.5)-abs(fract((p+0.5*w)*0.5)-0.5))/w; + // xor pattern + return 0.5 - 0.5*i.x*i.y; +} + +// https://www.shadertoy.com/view/tdS3DG +vec4 render( in vec3 ro, in vec3 rd) +{ + // background + vec3 col = vec3(0.7, 0.7, 0.9) - max(rd.y,0.0)*0.3; + + // raycast scene + vec2 res = raycast(ro,rd); + float t = res.x; + float m = res.y; + if( m>-0.5 ) + { + vec3 pos = ro + t*rd; + vec3 nor = (m<1.5) ? vec3(0.0,1.0,0.0) : calcNormal( pos ); + vec3 ref = reflect( rd, nor ); + + // material + col = 0.2 + 0.2*sin( m*2.0 + vec3(0.0,1.0,2.0) ); + float ks = 1.0; + + if( m<1.5 ) + { + float f = checkersGradBox( 3.0*pos.xz); + col = 0.15 + f*vec3(0.05); + ks = 0.4; + } + + // lighting + float occ = calcAO( pos, nor ); + + vec3 lin = vec3(0.0); + + // sun + { + vec3 lig = normalize( vec3(-0.5, 0.4, -0.6) ); + vec3 hal = normalize( lig-rd ); + float dif = clamp( dot( nor, lig ), 0.0, 1.0 ); + //if( dif>0.0001 ) + dif *= calcSoftshadow( pos, lig, 0.02, 2.5 ); + float spe = pow( clamp( dot( nor, hal ), 0.0, 1.0 ),16.0); + spe *= dif; + spe *= 0.04+0.96*pow(clamp(1.0-dot(hal,lig),0.0,1.0),5.0); + //spe *= 0.04+0.96*pow(clamp(1.0-sqrt(0.5*(1.0-dot(rd,lig))),0.0,1.0),5.0); + lin += col*2.20*dif*vec3(1.30,1.00,0.70); + lin += 5.00*spe*vec3(1.30,1.00,0.70)*ks; + } + // sky + { + float dif = sqrt(clamp( 0.5+0.5*nor.y, 0.0, 1.0 )); + dif *= occ; + float spe = smoothstep( -0.2, 0.2, ref.y ); + spe *= dif; + spe *= 0.04+0.96*pow(clamp(1.0+dot(nor,rd),0.0,1.0), 5.0 ); + //if( spe>0.001 ) + spe *= calcSoftshadow( pos, ref, 0.02, 2.5 ); + lin += col*0.60*dif*vec3(0.40,0.60,1.15); + lin += 2.00*spe*vec3(0.40,0.60,1.30)*ks; + } + // back + { + float dif = clamp( dot( nor, normalize(vec3(0.5,0.0,0.6))), 0.0, 1.0 )*clamp( 1.0-pos.y,0.0,1.0); + dif *= occ; + lin += col*0.55*dif*vec3(0.25,0.25,0.25); + } + // sss + { + float dif = pow(clamp(1.0+dot(nor,rd),0.0,1.0),2.0); + dif *= occ; + lin += col*0.25*dif*vec3(1.00,1.00,1.00); + } + + col = lin; + + col = mix( col, vec3(0.7,0.7,0.9), 1.0-exp( -0.0001*t*t*t ) ); + } + + return vec4(vec3( clamp(col,0.0,1.0) ),t); +} + +vec3 CalcRayDir(vec2 nCoord){ + vec3 horizontal = normalize(cross(camDir,vec3(.0 , 1.0, .0))); + vec3 vertical = normalize(cross(horizontal,camDir)); + return normalize(camDir + horizontal*nCoord.x + vertical*nCoord.y); +} + +mat3 setCamera() +{ + vec3 cw = normalize(camDir); + vec3 cp = vec3(0.0, 1.0 ,0.0); + vec3 cu = normalize( cross(cw,cp) ); + vec3 cv = ( cross(cu,cw) ); + return mat3( cu, cv, cw ); +} + +void main() +{ + vec2 nCoord = (gl_FragCoord.xy - screenCenter.xy)/screenCenter.y; + mat3 ca = setCamera(); + + // focal length + float fl = length(camDir); + vec3 rd = ca * normalize( vec3(nCoord,fl) ); + vec3 color = vec3(nCoord/2.0 + 0.5, 0.0); + float depth = gl_FragCoord.z; + { + vec4 res = render( camPos - vec3(0.0, 0.0, 0.0) , rd ); + color = res.xyz; + depth = CalcDepth(rd,res.w); + } + gl_FragColor = vec4(color , 1.0); + gl_FragDepth = depth; +} \ No newline at end of file diff --git a/examples/shaders/shaders_hybrid_render.c b/examples/shaders/shaders_hybrid_render.c new file mode 100644 index 000000000..86ba6397b --- /dev/null +++ b/examples/shaders/shaders_hybrid_render.c @@ -0,0 +1,212 @@ +/******************************************************************************************* +* +* raylib [shaders] example - Hybrid Rendering +* +* Example originally created with raylib 4.2, last time updated with raylib 4.2 +* +* Example contributed by Buğra Alptekin Sarı (@BugraAlptekinSari) and reviewed by Ramon Santamaria (@raysan5) +* +* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified, +* BSD-like license that allows static linking with closed source software +* +* Copyright (c) 2022-2023 Buğra Alptekin Sarı (@BugraAlptekinSari) +* +********************************************************************************************/ + +#include "raylib.h" +#include "rlgl.h" +#include "math.h" // Used for tan() +#include "raymath.h" // Used to calculate camera Direction + +#if defined(PLATFORM_DESKTOP) +#define GLSL_VERSION 330 +#else // PLATFORM_RPI, PLATFORM_ANDROID, PLATFORM_WEB +#define GLSL_VERSION 100 +#endif + +//------------------------------------------------------------------------------------ +// Declare custom functions required for the example +//------------------------------------------------------------------------------------ +// Load custom render texture, create a writable depth texture buffer +static RenderTexture2D LoadRenderTextureDepthTex(int width, int height); +// Unload render texture from GPU memory (VRAM) +static void UnloadRenderTextureDepthTex(RenderTexture2D target); + +//------------------------------------------------------------------------------------ +// Declare custom Structs +//------------------------------------------------------------------------------------ + +typedef struct { + unsigned int camPos, camDir, screenCenter; +}RayLocs ; + +//------------------------------------------------------------------------------------ +// Program main entry point +//------------------------------------------------------------------------------------ +int main(void) +{ + // Initialization + //-------------------------------------------------------------------------------------- + const int screenWidth = 800; + const int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [shaders] example - write depth buffer"); + + // This Shader calculates pixel depth and color using raymarch. + Shader raymarch_shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/hybrid_raymarch.fs", GLSL_VERSION)); + // This Shader is a standard rasterization fragment shader with the addition of depth writing. You are required to write depth for all shaders if one shader does it. + Shader raster_shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/hybrid_raster.fs", GLSL_VERSION)); + + // Declare Struct used to store camera locs. + RayLocs march_locs = {0}; + + // Fill the struct with shader locs. + march_locs.camPos = GetShaderLocation(raymarch_shader, "camPos"); + march_locs.camDir = GetShaderLocation(raymarch_shader, "camDir"); + march_locs.screenCenter = GetShaderLocation(raymarch_shader, "screenCenter"); + + { // Transfer screenCenter position to shader. Which is used to calculate ray direction. + Vector2 screenCenter = {.x = screenWidth/2.0, .y = screenHeight/2.0}; + SetShaderValue(raymarch_shader, march_locs.screenCenter , &screenCenter , SHADER_UNIFORM_VEC2); + } + + + // Use Customized function to create writable depth texture buffer + RenderTexture2D target = LoadRenderTextureDepthTex(screenWidth, screenHeight); + + // Define the camera to look into our 3d world + Camera camera = { + .position = (Vector3){ 0.5f, 1.0f, 1.5f }, // Camera position + .target = (Vector3){ 0.0f, 0.5f, 0.0f }, // Camera looking at point + .up = (Vector3){ 0.0f, 1.0f, 0.0f }, // Camera up vector (rotation towards target) + .fovy = 45.0f, // Camera field-of-view Y + .projection = CAMERA_PERSPECTIVE // Camera mode type + }; + + // Camera FOV is pre-calculated in the camera Distance. + double camDist = 1.0/(tan(camera.fovy*0.5*DEG2RAD)); + + SetCameraMode(camera, CAMERA_FIRST_PERSON); + + SetTargetFPS(60); + //-------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // Update + //---------------------------------------------------------------------------------- + UpdateCamera(&camera); + + //Update Camera Postion in the ray march shader. + SetShaderValue(raymarch_shader, march_locs.camPos, &(camera.position), RL_SHADER_UNIFORM_VEC3); + + { // Update Camera Looking Vector. Vector length determines FOV. + Vector3 camDir = Vector3Scale( Vector3Normalize( Vector3Subtract(camera.target, camera.position)) , camDist); + SetShaderValue(raymarch_shader, march_locs.camDir, &(camDir), RL_SHADER_UNIFORM_VEC3); + } + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + + // Draw into our custom render texture (framebuffer) + BeginTextureMode(target); + ClearBackground(WHITE); + + // Raymarch Scene + rlEnableDepthTest(); //Manually enable Depth Test to handle multiple rendering methods. + BeginShaderMode(raymarch_shader); + DrawRectangleRec((Rectangle){0,0,screenWidth,screenHeight},WHITE); + EndShaderMode(); + + // Raserize Scene + BeginMode3D(camera); + BeginShaderMode(raster_shader); + DrawCubeWiresV((Vector3){ 0.0f, 0.5f, 1.0f }, (Vector3){ 1.0f, 1.0f, 1.0f }, RED); + DrawCubeV((Vector3){ 0.0f, 0.5f, 1.0f }, (Vector3){ 1.0f, 1.0f, 1.0f }, PURPLE); + DrawCubeWiresV((Vector3){ 0.0f, 0.5f, -1.0f }, (Vector3){ 1.0f, 1.0f, 1.0f }, DARKGREEN); + DrawCubeV((Vector3) { 0.0f, 0.5f, -1.0f }, (Vector3){ 1.0f, 1.0f, 1.0f }, YELLOW); + DrawGrid(10, 1.0f); + EndShaderMode(); + EndMode3D(); + EndTextureMode(); + + // Draw into screen our custom render texture + BeginDrawing(); + ClearBackground(RAYWHITE); + + DrawTextureRec(target.texture, (Rectangle) { 0, 0, screenWidth, -screenHeight }, (Vector2) { 0, 0 }, WHITE); + DrawFPS(10, 10); + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + UnloadRenderTextureDepthTex(target); + UnloadShader(raymarch_shader); + UnloadShader(raster_shader); + + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} + +//------------------------------------------------------------------------------------ +// Define custom functions required for the example +//------------------------------------------------------------------------------------ +// Load custom render texture, create a writable depth texture buffer +RenderTexture2D LoadRenderTextureDepthTex(int width, int height) +{ + RenderTexture2D target = { 0 }; + + target.id = rlLoadFramebuffer(width, height); // Load an empty framebuffer + + if (target.id > 0) + { + rlEnableFramebuffer(target.id); + + // Create color texture (default to RGBA) + target.texture.id = rlLoadTexture(0, width, height, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 1); + target.texture.width = width; + target.texture.height = height; + target.texture.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8; + target.texture.mipmaps = 1; + + // Create depth texture buffer (instead of raylib default renderbuffer) + target.depth.id = rlLoadTextureDepth(width, height, false); + target.depth.width = width; + target.depth.height = height; + target.depth.format = 19; //DEPTH_COMPONENT_24BIT? + target.depth.mipmaps = 1; + + // Attach color texture and depth texture to FBO + rlFramebufferAttach(target.id, target.texture.id, RL_ATTACHMENT_COLOR_CHANNEL0, RL_ATTACHMENT_TEXTURE2D, 0); + rlFramebufferAttach(target.id, target.depth.id, RL_ATTACHMENT_DEPTH, RL_ATTACHMENT_TEXTURE2D, 0); + + // Check if fbo is complete with attachments (valid) + if (rlFramebufferComplete(target.id)) TRACELOG(LOG_INFO, "FBO: [ID %i] Framebuffer object created successfully", target.id); + + rlDisableFramebuffer(); + } + else TRACELOG(LOG_WARNING, "FBO: Framebuffer object can not be created"); + + return target; +} + +// Unload render texture from GPU memory (VRAM) +void UnloadRenderTextureDepthTex(RenderTexture2D target) +{ + if (target.id > 0) + { + // Color texture attached to FBO is deleted + rlUnloadTexture(target.texture.id); + rlUnloadTexture(target.depth.id); + + // NOTE: Depth texture is automatically + // queried and deleted before deleting framebuffer + rlUnloadFramebuffer(target.id); + } +} \ No newline at end of file diff --git a/examples/shaders/shaders_hybrid_render.png b/examples/shaders/shaders_hybrid_render.png new file mode 100644 index 000000000..0a63d19c2 Binary files /dev/null and b/examples/shaders/shaders_hybrid_render.png differ diff --git a/examples/shaders/shaders_write_depth.png b/examples/shaders/shaders_write_depth.png new file mode 100644 index 000000000..5a56d7d25 Binary files /dev/null and b/examples/shaders/shaders_write_depth.png differ