From ae9087aea7aa2b19bf78daa6593d14dfba98183d Mon Sep 17 00:00:00 2001 From: Dan Goodliffe Date: Wed, 28 Aug 2024 03:48:19 +0100 Subject: Initial cut of shadow map creation with support for billboard shadows --- gfx/gl/shaders/shadowDynamicPointStencil.gs | 32 +++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 gfx/gl/shaders/shadowDynamicPointStencil.gs (limited to 'gfx/gl/shaders/shadowDynamicPointStencil.gs') diff --git a/gfx/gl/shaders/shadowDynamicPointStencil.gs b/gfx/gl/shaders/shadowDynamicPointStencil.gs new file mode 100644 index 0000000..6d707ae --- /dev/null +++ b/gfx/gl/shaders/shadowDynamicPointStencil.gs @@ -0,0 +1,32 @@ +#version 330 core +#extension GL_ARB_viewport_array : enable + +const vec2[] corners = vec2[4](vec2(-1, -1), vec2(-1, 1), vec2(1, -1), vec2(1, 1)); + +uniform mat4 viewProjection[4]; +uniform int viewProjections; +uniform vec3 sizes[4]; +uniform float size; + +in ivec3 vworldPos[]; + +flat out vec3 scale; +out vec2 texCoord; + +layout(points) in; +layout(triangle_strip, max_vertices = 16) out; + +void +main() +{ + for (gl_Layer = 0; gl_Layer < viewProjections; ++gl_Layer) { + scale = 2.0 * size / sizes[gl_Layer]; + vec4 pos = viewProjection[gl_Layer] * vec4(vworldPos[0], 1); + for (int c = 0; c < corners.length(); ++c) { + gl_Position = pos + vec4(scale.xy * corners[c], 0, 0); + texCoord = (corners[c] * 0.5) + 0.5; + EmitVertex(); + } + EndPrimitive(); + } +} -- cgit v1.2.3