329 lines
9.5 KiB
C++
329 lines
9.5 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <stddef.h>
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#include <sys/types.h>
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#include <stdbool.h>
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#include "rtcore_config.h"
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RTC_NAMESPACE_BEGIN
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#if defined(_WIN32)
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#if defined(_M_X64)
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typedef long long ssize_t;
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#else
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typedef int ssize_t;
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#endif
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#endif
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// -- GODOT start --
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#if defined(_WIN32) && defined(_MSC_VER)
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// -- GODOT end --
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# define RTC_ALIGN(...) __declspec(align(__VA_ARGS__))
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#else
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# define RTC_ALIGN(...) __attribute__((aligned(__VA_ARGS__)))
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#endif
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#if !defined (RTC_DEPRECATED)
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#ifdef __GNUC__
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#define RTC_DEPRECATED __attribute__((deprecated))
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#elif defined(_MSC_VER)
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#define RTC_DEPRECATED __declspec(deprecated)
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#else
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#define RTC_DEPRECATED
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#endif
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#endif
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#if defined(_WIN32)
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# define RTC_FORCEINLINE __forceinline
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#else
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# define RTC_FORCEINLINE inline __attribute__((always_inline))
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#endif
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/* Invalid geometry ID */
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#define RTC_INVALID_GEOMETRY_ID ((unsigned int)-1)
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/* Maximum number of time steps */
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#define RTC_MAX_TIME_STEP_COUNT 129
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/* Formats of buffers and other data structures */
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enum RTCFormat
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{
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RTC_FORMAT_UNDEFINED = 0,
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/* 8-bit unsigned integer */
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RTC_FORMAT_UCHAR = 0x1001,
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RTC_FORMAT_UCHAR2,
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RTC_FORMAT_UCHAR3,
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RTC_FORMAT_UCHAR4,
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/* 8-bit signed integer */
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RTC_FORMAT_CHAR = 0x2001,
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RTC_FORMAT_CHAR2,
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RTC_FORMAT_CHAR3,
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RTC_FORMAT_CHAR4,
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/* 16-bit unsigned integer */
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RTC_FORMAT_USHORT = 0x3001,
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RTC_FORMAT_USHORT2,
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RTC_FORMAT_USHORT3,
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RTC_FORMAT_USHORT4,
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/* 16-bit signed integer */
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RTC_FORMAT_SHORT = 0x4001,
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RTC_FORMAT_SHORT2,
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RTC_FORMAT_SHORT3,
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RTC_FORMAT_SHORT4,
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/* 32-bit unsigned integer */
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RTC_FORMAT_UINT = 0x5001,
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RTC_FORMAT_UINT2,
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RTC_FORMAT_UINT3,
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RTC_FORMAT_UINT4,
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/* 32-bit signed integer */
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RTC_FORMAT_INT = 0x6001,
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RTC_FORMAT_INT2,
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RTC_FORMAT_INT3,
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RTC_FORMAT_INT4,
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/* 64-bit unsigned integer */
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RTC_FORMAT_ULLONG = 0x7001,
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RTC_FORMAT_ULLONG2,
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RTC_FORMAT_ULLONG3,
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RTC_FORMAT_ULLONG4,
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/* 64-bit signed integer */
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RTC_FORMAT_LLONG = 0x8001,
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RTC_FORMAT_LLONG2,
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RTC_FORMAT_LLONG3,
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RTC_FORMAT_LLONG4,
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/* 32-bit float */
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RTC_FORMAT_FLOAT = 0x9001,
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RTC_FORMAT_FLOAT2,
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RTC_FORMAT_FLOAT3,
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RTC_FORMAT_FLOAT4,
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RTC_FORMAT_FLOAT5,
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RTC_FORMAT_FLOAT6,
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RTC_FORMAT_FLOAT7,
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RTC_FORMAT_FLOAT8,
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RTC_FORMAT_FLOAT9,
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RTC_FORMAT_FLOAT10,
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RTC_FORMAT_FLOAT11,
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RTC_FORMAT_FLOAT12,
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RTC_FORMAT_FLOAT13,
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RTC_FORMAT_FLOAT14,
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RTC_FORMAT_FLOAT15,
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RTC_FORMAT_FLOAT16,
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/* 32-bit float matrix (row-major order) */
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RTC_FORMAT_FLOAT2X2_ROW_MAJOR = 0x9122,
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RTC_FORMAT_FLOAT2X3_ROW_MAJOR = 0x9123,
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RTC_FORMAT_FLOAT2X4_ROW_MAJOR = 0x9124,
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RTC_FORMAT_FLOAT3X2_ROW_MAJOR = 0x9132,
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RTC_FORMAT_FLOAT3X3_ROW_MAJOR = 0x9133,
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RTC_FORMAT_FLOAT3X4_ROW_MAJOR = 0x9134,
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RTC_FORMAT_FLOAT4X2_ROW_MAJOR = 0x9142,
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RTC_FORMAT_FLOAT4X3_ROW_MAJOR = 0x9143,
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RTC_FORMAT_FLOAT4X4_ROW_MAJOR = 0x9144,
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/* 32-bit float matrix (column-major order) */
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RTC_FORMAT_FLOAT2X2_COLUMN_MAJOR = 0x9222,
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RTC_FORMAT_FLOAT2X3_COLUMN_MAJOR = 0x9223,
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RTC_FORMAT_FLOAT2X4_COLUMN_MAJOR = 0x9224,
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RTC_FORMAT_FLOAT3X2_COLUMN_MAJOR = 0x9232,
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RTC_FORMAT_FLOAT3X3_COLUMN_MAJOR = 0x9233,
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RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR = 0x9234,
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RTC_FORMAT_FLOAT4X2_COLUMN_MAJOR = 0x9242,
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RTC_FORMAT_FLOAT4X3_COLUMN_MAJOR = 0x9243,
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RTC_FORMAT_FLOAT4X4_COLUMN_MAJOR = 0x9244,
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/* special 12-byte format for grids */
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RTC_FORMAT_GRID = 0xA001
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};
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/* Build quality levels */
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enum RTCBuildQuality
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{
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RTC_BUILD_QUALITY_LOW = 0,
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RTC_BUILD_QUALITY_MEDIUM = 1,
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RTC_BUILD_QUALITY_HIGH = 2,
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RTC_BUILD_QUALITY_REFIT = 3,
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};
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/* Axis-aligned bounding box representation */
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struct RTC_ALIGN(16) RTCBounds
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{
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float lower_x, lower_y, lower_z, align0;
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float upper_x, upper_y, upper_z, align1;
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};
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/* Linear axis-aligned bounding box representation */
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struct RTC_ALIGN(16) RTCLinearBounds
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{
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struct RTCBounds bounds0;
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struct RTCBounds bounds1;
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};
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/* Intersection context flags */
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enum RTCIntersectContextFlags
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{
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RTC_INTERSECT_CONTEXT_FLAG_NONE = 0,
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RTC_INTERSECT_CONTEXT_FLAG_INCOHERENT = (0 << 0), // optimize for incoherent rays
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RTC_INTERSECT_CONTEXT_FLAG_COHERENT = (1 << 0) // optimize for coherent rays
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};
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/* Arguments for RTCFilterFunctionN */
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struct RTCFilterFunctionNArguments
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{
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int* valid;
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void* geometryUserPtr;
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struct RTCIntersectContext* context;
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struct RTCRayN* ray;
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struct RTCHitN* hit;
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unsigned int N;
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};
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/* Filter callback function */
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typedef void (*RTCFilterFunctionN)(const struct RTCFilterFunctionNArguments* args);
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/* Intersection context passed to intersect/occluded calls */
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struct RTCIntersectContext
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{
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enum RTCIntersectContextFlags flags; // intersection flags
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RTCFilterFunctionN filter; // filter function to execute
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#if RTC_MAX_INSTANCE_LEVEL_COUNT > 1
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unsigned int instStackSize; // Number of instances currently on the stack.
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#endif
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unsigned int instID[RTC_MAX_INSTANCE_LEVEL_COUNT]; // The current stack of instance ids.
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#if RTC_MIN_WIDTH
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float minWidthDistanceFactor; // curve radius is set to this factor times distance to ray origin
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#endif
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};
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/* Initializes an intersection context. */
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RTC_FORCEINLINE void rtcInitIntersectContext(struct RTCIntersectContext* context)
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{
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unsigned l = 0;
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context->flags = RTC_INTERSECT_CONTEXT_FLAG_INCOHERENT;
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context->filter = NULL;
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#if RTC_MAX_INSTANCE_LEVEL_COUNT > 1
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context->instStackSize = 0;
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#endif
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for (; l < RTC_MAX_INSTANCE_LEVEL_COUNT; ++l)
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context->instID[l] = RTC_INVALID_GEOMETRY_ID;
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#if RTC_MIN_WIDTH
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context->minWidthDistanceFactor = 0.0f;
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#endif
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}
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/* Point query structure for closest point query */
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struct RTC_ALIGN(16) RTCPointQuery
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{
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float x; // x coordinate of the query point
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float y; // y coordinate of the query point
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float z; // z coordinate of the query point
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float time; // time of the point query
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float radius; // radius of the point query
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};
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/* Structure of a packet of 4 query points */
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struct RTC_ALIGN(16) RTCPointQuery4
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{
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float x[4]; // x coordinate of the query point
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float y[4]; // y coordinate of the query point
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float z[4]; // z coordinate of the query point
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float time[4]; // time of the point query
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float radius[4]; // radius of the point query
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};
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/* Structure of a packet of 8 query points */
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struct RTC_ALIGN(32) RTCPointQuery8
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{
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float x[8]; // x coordinate of the query point
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float y[8]; // y coordinate of the query point
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float z[8]; // z coordinate of the query point
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float time[8]; // time of the point query
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float radius[8]; // radius ofr the point query
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};
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/* Structure of a packet of 16 query points */
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struct RTC_ALIGN(64) RTCPointQuery16
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{
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float x[16]; // x coordinate of the query point
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float y[16]; // y coordinate of the query point
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float z[16]; // z coordinate of the query point
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float time[16]; // time of the point quey
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float radius[16]; // radius of the point query
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};
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struct RTCPointQueryN;
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struct RTC_ALIGN(16) RTCPointQueryContext
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{
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// accumulated 4x4 column major matrices from world space to instance space.
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// undefined if size == 0.
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float world2inst[RTC_MAX_INSTANCE_LEVEL_COUNT][16];
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// accumulated 4x4 column major matrices from instance space to world space.
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// undefined if size == 0.
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float inst2world[RTC_MAX_INSTANCE_LEVEL_COUNT][16];
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// instance ids.
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unsigned int instID[RTC_MAX_INSTANCE_LEVEL_COUNT];
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// number of instances currently on the stack.
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unsigned int instStackSize;
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};
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/* Initializes an intersection context. */
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RTC_FORCEINLINE void rtcInitPointQueryContext(struct RTCPointQueryContext* context)
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{
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context->instStackSize = 0;
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context->instID[0] = RTC_INVALID_GEOMETRY_ID;
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}
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struct RTC_ALIGN(16) RTCPointQueryFunctionArguments
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{
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// The (world space) query object that was passed as an argument of rtcPointQuery. The
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// radius of the query can be decreased inside the callback to shrink the
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// search domain. Increasing the radius or modifying the time or position of
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// the query results in undefined behaviour.
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struct RTCPointQuery* query;
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// Used for user input/output data. Will not be read or modified internally.
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void* userPtr;
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// primitive and geometry ID of primitive
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unsigned int primID;
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unsigned int geomID;
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// the context with transformation and instance ID stack
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struct RTCPointQueryContext* context;
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// If the current instance transform M (= context->world2inst[context->instStackSize])
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// is a similarity matrix, i.e there is a constant factor similarityScale such that,
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// for all x,y: dist(Mx, My) = similarityScale * dist(x, y),
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// The similarity scale is 0, if the current instance transform is not a
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// similarity transform and vice versa. The similarity scale allows to compute
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// distance information in instance space and scale the distances into world
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// space by dividing with the similarity scale, for example, to update the
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// query radius. If the current instance transform is not a similarity
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// transform (similarityScale = 0), the distance computation has to be
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// performed in world space to ensure correctness. if there is no instance
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// transform (context->instStackSize == 0), the similarity scale is 1.
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float similarityScale;
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};
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typedef bool (*RTCPointQueryFunction)(struct RTCPointQueryFunctionArguments* args);
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RTC_NAMESPACE_END
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