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The different FOV and scale is achieved with a 3x3 matrix multiplication that is applied in the shader after WPO. This matrix scales the geometry towards the camera and also scales the XY components in view space to cancel out the scene FOV and to achieve the intended first person FOV. This means that the first person geometry is modified in world space before any projection, so the rest of the renderer doesn't need to deal with a separate projection matrix (and related matrices), but it also means that we're lighting fairly small and slightly deformed geometry. In practise, the morphing seems to be acceptable. The scaling appears to be mostly inconsequential for for lighting and reflections, but scene shadows cast onto the first person geometry are a bit more binary. self-shadows and casting shadows onto the scene are problems that will be solved in separate CLs. For now it is probably best to untick "Cast Shadows" on the first person geometry. #rb Kevin.Ortegren, Jeremy.Moore, Brian.Karis, Charles.deRousiers, Jon.Cain #rnx [CL 34704780 by tim doerries in ue5-main branch]
114 lines
5.9 KiB
C
114 lines
5.9 KiB
C
// Copyright Epic Games, Inc. All Rights Reserved.
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/*================================================================================================
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!!!! Changing this file requires recompilation of the engine !!!
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=================================================================================================*/
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#pragma once
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// GPUCULL_TODO: Eventually we need to remove this workaround
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#define VF_TREAT_INSTANCE_ID_OFFSET_AS_PRIMITIVE_ID_FLAG (1U << 31U)
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#define PRIMITIVE_ID_NUM_BITS (20u) // Max of 1,048,576 primitives
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#define INSTANCE_ID_NUM_BITS (24u) // Max of 16,777,216 instances in the buffer
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#define INSTANCE_SCENE_DATA_FLAGS_NUM_BITS (12u) // Max of 12 flags
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#define INSTANCE_RELATIVE_ID_NUM_BITS (24u) // Max of 16,777,216 instances per primitive
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#define INSTANCE_CUSTOM_DATA_COUNT_NUM_BITS (8u) // Max of 255 custom data floats per instance
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#define MAX_PRIMITIVE_ID (1U << PRIMITIVE_ID_NUM_BITS)
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#define MAX_INSTANCE_ID (1U << INSTANCE_ID_NUM_BITS)
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#define PRIMITIVE_ID_MASK ((1u << PRIMITIVE_ID_NUM_BITS) - 1u)
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#define INSTANCE_ID_MASK ((1u << INSTANCE_ID_NUM_BITS) - 1u)
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#define INSTANCE_RELATIVE_ID_MASK ((1u << INSTANCE_RELATIVE_ID_NUM_BITS) - 1u)
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#define INVALID_PRIMITIVE_ID PRIMITIVE_ID_MASK
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// Primitive scene data flags
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#define PRIMITIVE_SCENE_DATA_FLAG_CAST_SHADOWS 0x1
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#define PRIMITIVE_SCENE_DATA_FLAG_USE_SINGLE_SAMPLE_SHADOW_SL 0x2
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#define PRIMITIVE_SCENE_DATA_FLAG_USE_VOLUMETRIC_LM_SHADOW_SL 0x4
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#define PRIMITIVE_SCENE_DATA_FLAG_DECAL_RECEIVER 0x8
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#define PRIMITIVE_SCENE_DATA_FLAG_CACHE_SHADOW_AS_STATIC 0x10
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#define PRIMITIVE_SCENE_DATA_FLAG_OUTPUT_VELOCITY 0x20
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#define PRIMITIVE_SCENE_DATA_FLAG_DETERMINANT_SIGN 0x40
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_DISTANCE_FIELD_REPRESENTATION 0x80
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_CAPSULE_REPRESENTATION 0x100
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_CAST_CONTACT_SHADOW 0x200
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_PRIMITIVE_CUSTOM_DATA 0x400
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#define PRIMITIVE_SCENE_DATA_FLAG_LIGHTING_CHANNEL_0 0x800
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#define PRIMITIVE_SCENE_DATA_FLAG_LIGHTING_CHANNEL_1 0x1000
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#define PRIMITIVE_SCENE_DATA_FLAG_LIGHTING_CHANNEL_2 0x2000
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_INSTANCE_LOCAL_BOUNDS 0x4000
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#define PRIMITIVE_SCENE_DATA_FLAG_EVALUATE_WORLD_POSITION_OFFSET 0x8000
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_NANITE_IMPOSTER 0x10000
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#define PRIMITIVE_SCENE_DATA_FLAG_INSTANCE_DRAW_DISTANCE_CULL 0x20000
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#define PRIMITIVE_SCENE_DATA_FLAG_WPO_DISABLE_DISTANCE 0x40000
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_ALWAYS_EVALUATE_WPO_MATERIALS 0x80000
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#define PRIMITIVE_SCENE_DATA_FLAG_WRITES_CUSTOM_DEPTH_STENCIL 0x100000
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#define PRIMITIVE_SCENE_DATA_FLAG_DISABLE_MATERIAL_INVALIDATIONS 0x200000
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#define PRIMITIVE_SCENE_DATA_FLAG_HOLDOUT 0x400000
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#define PRIMITIVE_SCENE_DATA_FLAG_SPLINE_MESH 0x800000
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#define PRIMITIVE_SCENE_DATA_FLAG_SKINNED_MESH 0x1000000
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#define PRIMITIVE_SCENE_DATA_FLAG_INSTANCE_CULLING_OCCLUSION_QUERIES 0x2000000 // Whether per-instance occlusion queries are allowed when performing GPUScene instance culling
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#define PRIMITIVE_SCENE_DATA_FLAG_HAS_PIXEL_ANIMATION 0x4000000
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#define PRIMITIVE_SCENE_DATA_FLAG_RAYTRACING_FAR_FIELD 0x8000000
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#define PRIMITIVE_SCENE_DATA_FLAG_RAYTRACING_HAS_GROUPID 0x10000000
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#define PRIMITIVE_SCENE_DATA_FLAG_PER_CLUSTER_DISPLACEMENT_FALLBACK_RASTER 0x20000000
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#define PRIMITIVE_SCENE_DATA_FLAG_IS_FIRST_PERSON_PRIMITIVE 0x40000000
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// Primitive visibility flags
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#define PRIMITIVE_VISIBILITY_FLAG_FORCE_HIDDEN 0x1
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#define PRIMITIVE_VISIBILITY_FLAG_CAST_HIDDEN_SHADOW 0x2
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_GAME 0x4
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_EDITOR 0x8
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_REFLECTION_CAPTURES 0x10
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_REAL_TIME_SKY_CAPTURES 0x20
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_RAY_TRACING 0x40
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_SCENE_CAPTURE_ONLY 0x80
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#define PRIMITIVE_VISIBILITY_FLAG_HIDDEN_IN_SCENE_CAPTURE 0x100
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#define PRIMITIVE_VISIBILITY_FLAG_VISIBLE_IN_LUMEN_SCENE 0x200
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#define SUPPORT_REVERSE_CULLING_IN_NANITE 0
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#if SUPPORT_REVERSE_CULLING_IN_NANITE
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#define PRIMITIVE_SCENE_DATA_FLAG_REVERSE_CULLING NOTE: Out of flags
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#endif
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// Stride of a single primitive's data in float4's
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#define PRIMITIVE_SCENE_DATA_STRIDE 43
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// Currently limited by # of bits for size in primitive scene data
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#define PRIMITIVE_SCENE_DATA_MAX_PAYLOAD_EXTENSION_SIZE 255
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// Instance scene data flags
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#define INSTANCE_SCENE_DATA_FLAG_DETERMINANT_SIGN 0x1
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#define INSTANCE_SCENE_DATA_FLAG_HAS_RANDOM 0x2
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#define INSTANCE_SCENE_DATA_FLAG_HAS_CUSTOM_DATA 0x4
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#define INSTANCE_SCENE_DATA_FLAG_HAS_DYNAMIC_DATA 0x8
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#define INSTANCE_SCENE_DATA_FLAG_HAS_SKINNING_DATA 0x10
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#define INSTANCE_SCENE_DATA_FLAG_HAS_LIGHTSHADOW_UV_BIAS 0x20
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#define INSTANCE_SCENE_DATA_FLAG_HAS_HIERARCHY_OFFSET 0x40
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#define INSTANCE_SCENE_DATA_FLAG_HAS_LOCAL_BOUNDS 0x80
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#define INSTANCE_SCENE_DATA_FLAG_HAS_PAYLOAD_EXTENSION 0x100
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#define INSTANCE_SCENE_DATA_FLAG_HAS_EDITOR_DATA 0x200
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#define INSTANCE_SCENE_DATA_FLAG_HIDDEN 0x400
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#define INSTANCE_SCENE_DATA_FLAG_PAYLOAD_MASK ( \
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INSTANCE_SCENE_DATA_FLAG_HAS_RANDOM \
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| INSTANCE_SCENE_DATA_FLAG_HAS_CUSTOM_DATA \
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| INSTANCE_SCENE_DATA_FLAG_HAS_DYNAMIC_DATA \
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| INSTANCE_SCENE_DATA_FLAG_HAS_SKINNING_DATA \
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| INSTANCE_SCENE_DATA_FLAG_HAS_LIGHTSHADOW_UV_BIAS \
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| INSTANCE_SCENE_DATA_FLAG_HAS_HIERARCHY_OFFSET \
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| INSTANCE_SCENE_DATA_FLAG_HAS_LOCAL_BOUNDS \
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| INSTANCE_SCENE_DATA_FLAG_HAS_EDITOR_DATA \
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| INSTANCE_SCENE_DATA_FLAG_HAS_PAYLOAD_EXTENSION \
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)
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// Specific to "UniformView" rendering path
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#define BATCHED_PRIMITIVE_DATA_STRIDE 512u
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#define BATCHED_INSTANCE_DATA_STRIDE 256u
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#define BATCHED_PRIMITIVE_DATA_STRIDE_FLOAT4 (BATCHED_PRIMITIVE_DATA_STRIDE/16u)
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#define BATCHED_INSTANCE_DATA_STRIDE_FLOAT4 (BATCHED_INSTANCE_DATA_STRIDE/16u) |