From b79ede4edb522b0cc5e458c49cb45d49ec902758 Mon Sep 17 00:00:00 2001 From: raysan5 Date: Wed, 8 Jun 2016 13:29:56 +0200 Subject: Added distortion shader to render --- examples/oculus_glfw_sample/distortion.fs | 64 +++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 examples/oculus_glfw_sample/distortion.fs (limited to 'examples/oculus_glfw_sample/distortion.fs') diff --git a/examples/oculus_glfw_sample/distortion.fs b/examples/oculus_glfw_sample/distortion.fs new file mode 100644 index 00000000..a9932651 --- /dev/null +++ b/examples/oculus_glfw_sample/distortion.fs @@ -0,0 +1,64 @@ +#version 330 + +// Input vertex attributes (from vertex shader) +in vec2 fragTexCoord; + +// Input uniform values +uniform sampler2D texture0; + +// Output fragment color +out vec4 finalColor; + +// NOTE: Add here your custom variables +const vec2 LeftLensCenter = vec2(0.2863248, 0.5); +const vec2 RightLensCenter = vec2(0.7136753, 0.5); +const vec2 LeftScreenCenter = vec2(0.25, 0.5); +const vec2 RightScreenCenter = vec2(0.75, 0.5); +const vec2 Scale = vec2(0.25, 0.45); //vec2(0.1469278, 0.2350845); +const vec2 ScaleIn = vec2(4, 2.2222); +const vec4 HmdWarpParam = vec4(1, 0.22, 0.24, 0); + +/* +// Another set of default values +ChromaAbCorrection = {1.0, 0.0, 1.0, 0} +DistortionK = {1.0, 0.22, 0.24, 0} +Scale = {0.25, 0.5*AspectRatio, 0, 0} +ScaleIn = {4.0, 2/AspectRatio, 0, 0} +Left Screen Center = {0.25, 0.5, 0, 0} +Left Lens Center = {0.287994117, 0.5, 0, 0} +Right Screen Center = {0.75, 0.5, 0, 0} +Right Lens Center = {0.712005913, 0.5, 0, 0} +*/ + +// Scales input texture coordinates for distortion. +vec2 HmdWarp(vec2 in01, vec2 LensCenter) +{ + vec2 theta = (in01 - LensCenter) * ScaleIn; // Scales to [-1, 1] + float rSq = theta.x * theta.x + theta.y * theta.y; + vec2 rvector = theta * (HmdWarpParam.x + HmdWarpParam.y * rSq + HmdWarpParam.z * rSq * rSq + HmdWarpParam.w * rSq * rSq * rSq); + + return LensCenter + Scale * rvector; +} + +void main() +{ + // SOURCE: http://www.mtbs3d.com/phpbb/viewtopic.php?f=140&t=17081 + + // The following two variables need to be set per eye + vec2 LensCenter = gl_FragCoord.x < 540 ? LeftLensCenter : RightLensCenter; + vec2 ScreenCenter = gl_FragCoord.x < 540 ? LeftScreenCenter : RightScreenCenter; + + //vec2 oTexCoord = (gl_FragCoord.xy + vec2(0.5, 0.5)) / vec2(1280, 800); //Uncomment if using BGE's built-in stereo rendering + + vec2 tc = HmdWarp(fragTexCoord, LensCenter); + + if (any(bvec2(clamp(tc,ScreenCenter-vec2(0.25,0.5), ScreenCenter+vec2(0.25,0.5)) - tc))) + { + gl_FragColor = vec4(vec3(0.0), 1.0); + } + else + { + //tc.x = gl_FragCoord.x < 640 ? (2.0 * tc.x) : (2.0 * (tc.x - 0.5)); //Uncomment if using BGE's built-in stereo rendering + gl_FragColor = texture2D(texture0, tc); + } +} \ No newline at end of file -- cgit v1.2.3 From 2d90cc59b6a338f9745dc1be398f8d8bef3f47bf Mon Sep 17 00:00:00 2001 From: Ray Date: Wed, 8 Jun 2016 18:48:25 +0200 Subject: Update distortion.fs --- examples/oculus_glfw_sample/distortion.fs | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-) (limited to 'examples/oculus_glfw_sample/distortion.fs') diff --git a/examples/oculus_glfw_sample/distortion.fs b/examples/oculus_glfw_sample/distortion.fs index a9932651..cd5951fe 100644 --- a/examples/oculus_glfw_sample/distortion.fs +++ b/examples/oculus_glfw_sample/distortion.fs @@ -33,11 +33,11 @@ Right Lens Center = {0.712005913, 0.5, 0, 0} // Scales input texture coordinates for distortion. vec2 HmdWarp(vec2 in01, vec2 LensCenter) { - vec2 theta = (in01 - LensCenter) * ScaleIn; // Scales to [-1, 1] - float rSq = theta.x * theta.x + theta.y * theta.y; - vec2 rvector = theta * (HmdWarpParam.x + HmdWarpParam.y * rSq + HmdWarpParam.z * rSq * rSq + HmdWarpParam.w * rSq * rSq * rSq); + vec2 theta = (in01 - LensCenter)*ScaleIn; // Scales to [-1, 1] + float rSq = theta.x*theta.x + theta.y*theta.y; + vec2 rvector = theta*(HmdWarpParam.x + HmdWarpParam.y*rSq + HmdWarpParam.z*rSq*rSq + HmdWarpParam.w*rSq*rSq*rSq); - return LensCenter + Scale * rvector; + return LensCenter + Scale*rvector; } void main() @@ -48,17 +48,12 @@ void main() vec2 LensCenter = gl_FragCoord.x < 540 ? LeftLensCenter : RightLensCenter; vec2 ScreenCenter = gl_FragCoord.x < 540 ? LeftScreenCenter : RightScreenCenter; - //vec2 oTexCoord = (gl_FragCoord.xy + vec2(0.5, 0.5)) / vec2(1280, 800); //Uncomment if using BGE's built-in stereo rendering - vec2 tc = HmdWarp(fragTexCoord, LensCenter); - if (any(bvec2(clamp(tc,ScreenCenter-vec2(0.25,0.5), ScreenCenter+vec2(0.25,0.5)) - tc))) - { - gl_FragColor = vec4(vec3(0.0), 1.0); - } + if (any(bvec2(clamp(tc,ScreenCenter-vec2(0.25,0.5), ScreenCenter+vec2(0.25,0.5)) - tc))) finalColor = vec4(0.0, 0.0, 0.0, 1.0); else { - //tc.x = gl_FragCoord.x < 640 ? (2.0 * tc.x) : (2.0 * (tc.x - 0.5)); //Uncomment if using BGE's built-in stereo rendering - gl_FragColor = texture2D(texture0, tc); + //tc.x = gl_FragCoord.x < 640 ? (2.0 * tc.x) : (2.0 * (tc.x - 0.5)); + finalColor = texture2D(texture0, tc); } -} \ No newline at end of file +} -- cgit v1.2.3