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Fragment color for nodes is now calculated from:
* Texture color, highlighted by artificial light if present (light color conveyed via vertex color).
* Texture color highlighted by natural light (conveyed via vertex color) filtered by shadow.
* Reflected day/moonlight filtered by shadow (color and intensity), assuming some portion of the light is directly reflected from the materials.
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Reduces stutter and freezes when playing.
* Maintains double SM and SM Color textures
* Light frustum update triggers incremental generation of shadow map into secondary 'future' textures.
* Every incremental update renders a portion of the shadow draw list (split equally).
* After defined number of frames (currently, 4), 'future' and 'current' textures are swapped, and DirectionalLight 'commits' the new frustum to use when rendering shadows on screen.
Co-authored-by: sfan5 <sfan5@live.de>
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Node faces with normals pointing East/West (+X/-X) will transition between light
and shadow at noon. This code makes the transition smooth.
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* Adjust minimum filter radius for perspective
* Expand shadow frustum when camera FOV changes, reuse FOV distance adjustment from numeric.cpp
* Read shadow_soft_radius setting as float
* Use adaptive filter radius to accomodate for PSM distortion
* Adjust filter radius for texture resolution
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Co-authored-by: x2048 <codeforsmile@gmail.com>
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Shader generation is a mess. This commit cleans some parts up, including dropping remains of HLSL support which was never actually implemented.
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This only works when shaders are enabled.
The centroid varying avoids that the textures (which repeat themselves out of bounds) are sampled out of bounds in MSAA.
If MSAA (called FSAA in minetest) is disabled, the centroid keyword does nothing.
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Shader support for OpenGL ES 2 devices (Android)
Co-authored-by: sfan5 <sfan5@live.de>
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Erase all traces of normal "generation" from fragment shaders
Remove the "feature" from the engine and default config
Remove any leftover documentation of it
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Workaround for the missing GL_ALPHA_TEST implementation in Mesa (etnaviv driver).
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1. Pass current camera offset to shader, so shader have access to the global coordinates
2. Pass animation timer to fragment shader. C++ code is already there, just wasn't declared in the shader
3. Delay animation timer wrap-around (from 100s to about 16 minutes)
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Pull if GENERATE_NORMALMAPS == 1 into the template to avoid evaluating
it for each fragment.
Remove if (fogDistance != 0.0).
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Optimise the fetching of global settings 'camera_smoothing',
'cinematic' and 'cinematic_camera_smoothing'.
Cache 'cam_smoothing'.
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using linear + binary search.
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OpenGL_vertex:
* bufferize a duplicate calcul
* Factorize vertexes
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This reverts commit 148fffb0f23fa437c67639ff3cc69177fb71d76a.
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OpenGL_vertex:
* bufferize a duplicate calcul
* Factorize vertexes
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Pass drawtype and material type to shaders.
Move shaders generation to startup only.
Allow assign shaders per tile.
Initial code to support water surface shader.
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