mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-04-25 05:28:37 -05:00
eriksunden
102 lines
4.4 KiB
GLSL
102 lines
4.4 KiB
GLSL
/*****************************************************************************************
|
|
* *
|
|
* OpenSpace *
|
|
* *
|
|
* Copyright (c) 2014-2019 *
|
|
* *
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
|
|
* software and associated documentation files (the "Software"), to deal in the Software *
|
|
* without restriction, including without limitation the rights to use, copy, modify, *
|
|
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
|
|
* permit persons to whom the Software is furnished to do so, subject to the following *
|
|
* conditions: *
|
|
* *
|
|
* The above copyright notice and this permission notice shall be included in all copies *
|
|
* or substantial portions of the Software. *
|
|
* *
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
|
|
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
|
|
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
|
|
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
|
|
****************************************************************************************/
|
|
|
|
#version __CONTEXT__
|
|
|
|
#include "floatoperations.glsl"
|
|
#include "PowerScaling/powerScalingMath.hglsl"
|
|
|
|
uniform dvec3 eyePosition;
|
|
uniform dvec3 cameraUp;
|
|
uniform dmat4 cameraViewProjectionMatrix;
|
|
uniform dmat4 modelMatrix;
|
|
|
|
layout(points) in;
|
|
layout(triangle_strip, max_vertices = 4) out;
|
|
|
|
in vec4 vs_gPosition[];
|
|
in vec3 vs_color[];
|
|
|
|
out vec4 vs_position;
|
|
out vec2 psfCoords;
|
|
flat out vec3 ge_color;
|
|
flat out float ge_screenSpaceDepth;
|
|
|
|
const double PARSEC = 3.08567756E16;
|
|
|
|
void main() {
|
|
vs_position = gl_in[0].gl_Position; // in object space
|
|
ge_color = vs_color[0];
|
|
|
|
double scaleMultiply = 8.0;
|
|
|
|
dvec4 dpos = dvec4(vs_position);
|
|
dpos.xyz *= scaleMultiply;
|
|
dpos = modelMatrix * dpos;
|
|
dpos /= PARSEC;
|
|
//It lies about 8 kpc from the center on what is known as the Orion Arm of the Milky Way
|
|
dpos.x += 8000;
|
|
|
|
scaleMultiply *= 4.0;
|
|
dvec3 scaledRight = dvec3(0.0);
|
|
dvec3 scaledUp = dvec3(0.0);
|
|
vec4 bottomLeftVertex, bottomRightVertex, topLeftVertex, topRightVertex;
|
|
|
|
dvec3 normal = normalize(eyePosition - dpos.xyz);
|
|
dvec3 newRight = normalize(cross(cameraUp, normal));
|
|
dvec3 newUp = cross(normal, newRight);
|
|
scaledRight = scaleMultiply * newRight;
|
|
scaledUp = scaleMultiply * newUp;
|
|
|
|
bottomLeftVertex = z_normalization(vec4(cameraViewProjectionMatrix *
|
|
dvec4(dpos.xyz - scaledRight - scaledUp, dpos.w)));
|
|
|
|
//dvec4 dposCamera = cameraViewProjectionMatrix * dpos;
|
|
//ge_screenSpaceDepth = float(length(eyePosition - dposCamera.xyz)/PARSEC);
|
|
ge_screenSpaceDepth = bottomLeftVertex.w;
|
|
|
|
topRightVertex = z_normalization(vec4(cameraViewProjectionMatrix *
|
|
dvec4(dpos.xyz + scaledUp + scaledRight, dpos.w)));
|
|
|
|
bottomRightVertex = z_normalization(vec4(cameraViewProjectionMatrix *
|
|
dvec4(dpos.xyz + scaledRight - scaledUp, dpos.w)));
|
|
topLeftVertex = z_normalization(vec4(cameraViewProjectionMatrix *
|
|
dvec4(dpos.xyz + scaledUp - scaledRight, dpos.w)));
|
|
|
|
// Build primitive
|
|
gl_Position = topLeftVertex;
|
|
psfCoords = vec2(-1.0, 1.0);
|
|
EmitVertex();
|
|
gl_Position = bottomLeftVertex;
|
|
psfCoords = vec2(-1.0, -1.0);
|
|
EmitVertex();
|
|
gl_Position = topRightVertex;
|
|
psfCoords = vec2(1.0, 1.0);
|
|
EmitVertex();
|
|
gl_Position = bottomRightVertex;
|
|
psfCoords = vec2(1.0, -1.0);
|
|
EmitVertex();
|
|
EndPrimitive();
|
|
}
|