mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-04-22 19:29:04 -05:00
Alexander Bock
82 lines
2.1 KiB
GLSL
82 lines
2.1 KiB
GLSL
#version 430 core
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in vec4 fColor;
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in vec3 vs_position;
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in float s;
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#include "../../../shaders/ABuffer/abufferStruct.hglsl"
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#include "../../../shaders/ABuffer/abufferAddToBuffer.hglsl"
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const float k = 10.0;
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const float s_far = 27.0f; //= gl_DepthRange.far; // 40
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const float s_farcutoff = 12.0f;
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const float s_nearcutoff = 7.00f;
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const float s_near = 0.00f;// gl_DepthRange.near; // 0.1
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vec4 psc_normlization(vec4 invec) {
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float xymax = max(invec.x,invec.y);
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if(invec.z > 0.0f || invec.z < 0.0f) {
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return invec / abs(invec.z);
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} else if (xymax != 0.0f) {
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return invec / xymax;
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} else {
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return invec / -.0;
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}
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}
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float pscDepth(vec4 position) {
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float depth = 0.0f;
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if(position.w <= 0.5) {
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//depth = abs(position.z * pow(10, position.w)) / pow(k,s_far);
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depth = (position.w+log(abs(position.z)))/pow(k, position.w);
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} else if(position.w < 3.0) {
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depth = position.w+log(abs(position.z))/pow(k, position.w);
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} else {
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depth = position.w+log(abs(position.z));
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}
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// DEBUG
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float depth_orig = depth;
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float x = 0.0f;
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float cutoffs = 0.0;
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float orig_z = position.z;
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// calculate a normalized depth [0.0 1.0]
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if((depth > s_near && depth <= s_nearcutoff) || (depth > s_farcutoff && depth < s_far)) {
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// completely linear interpolation [s_near .. depth .. s_far]
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depth = (depth - s_near) / (s_far - s_near);
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} else if(depth > s_nearcutoff && depth < s_farcutoff) {
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// DEBUG
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cutoffs = 1.0;
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// interpolate [10^s_nearcutoff .. 10^depth .. 10^s_farcutoff]
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// calculate between 0..1 where the depth is
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x = (pow(10,depth) - pow(10, s_nearcutoff)) / (pow(10,s_farcutoff) - pow(10, s_nearcutoff));
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// remap the depth to the 0..1 depth buffer
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depth = s_nearcutoff + x * (s_farcutoff - s_nearcutoff);
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depth = (depth - s_near) / (s_far - s_near);
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}
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return depth;
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}
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void main() {
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vec4 fragColor = fColor;
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//float val = 1.0;
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//fragColor = vec4(val, 0.0, val, val);
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vec4 position = vec4(vs_position,s);
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float depth = pscDepth(position);
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ABufferStruct_t frag = createGeometryFragment(fragColor, position, depth);
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addToBuffer(frag);
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discard;
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} |