From 7c1e9b25fa4062a69ea00c20cdbcc745d1b82659 Mon Sep 17 00:00:00 2001 From: Dan Goodliffe Date: Thu, 5 Jan 2023 19:45:36 +0000 Subject: Add rendering support for spot lights --- gfx/gl/shaders/spotLight.fs | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 gfx/gl/shaders/spotLight.fs (limited to 'gfx/gl/shaders/spotLight.fs') diff --git a/gfx/gl/shaders/spotLight.fs b/gfx/gl/shaders/spotLight.fs new file mode 100644 index 0000000..add86fd --- /dev/null +++ b/gfx/gl/shaders/spotLight.fs @@ -0,0 +1,34 @@ +#version 330 core +#extension GL_ARB_shading_language_420pack : enable + +out vec3 FragColor; + +layout(binding = 0) uniform sampler2D gPosition; +layout(binding = 1) uniform sampler2D gNormal; +uniform ivec4 viewPort; +uniform vec3 colour; +uniform float kq; +in vec4 geo_centre; +in vec4 geo_direction; + +void +main() +{ + const vec2 texCoord = gl_FragCoord.xy / viewPort.zw; + const vec3 position = texture(gPosition, texCoord).xyz; + const vec3 lightv = position - geo_centre.xyz; + const float lightDist = length(lightv); + if (lightDist > geo_centre.w) { + discard; + } + const vec3 lightDirection = normalize(lightv); + if (dot(lightDirection, geo_direction.xyz) < geo_direction.w) { + discard; + } + const vec3 normal = texture(gNormal, texCoord).xyz; + const float normalDot = dot(-lightDirection, normal); + if (normalDot < 0) { + discard; + } + FragColor = (colour * normalDot) / (1 + (kq * pow(lightDist, 2))); +} -- cgit v1.2.3