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# ivideo/graph3d.h File Reference

3D graphics interface More...

`#include "csutil/scf.h"`
`#include "csgeom/transfrm.h"`
`#include "csutil/flags.h"`
`#include "csutil/strset.h"`
`#include "ivideo/rndbuf.h"`

Go to the source code of this file.

## Classes
struct | csAlphaMode
| Describes how to deal with alpha values in textures. More...
struct | csGraphics3DCaps
| Information about 3d renderer capabilities. More...
struct | csSimpleRenderMesh
| A simple render mesh. More...
struct | iGraphics3D
| This is the standard 3D graphics interface. More...
## Clipping requirement for DrawTriangleMesh
#define | CS_CLIP_NEEDED 1
| Clipping may be needed.
#define | CS_CLIP_NOT 0
| No clipping required.
## Type of clipper (for iGraphics3D::SetClipper())
#define | CS_CLIPPER_NONE -1
| There is no clipper.
#define | CS_CLIPPER_OPTIONAL 0
| Clipper is optional.
#define | CS_CLIPPER_REQUIRED 2
| Clipper is required.
#define | CS_CLIPPER_TOPLEVEL 1
| Clipper is top-level.
## Mix mode: Default modes
A set of commonly used mix modes.
#define | CS_FX_ADD (CS_MIXMODE_BLEND(ONE, ONE) | CS_MIXMODE_ALPHATEST_DISABLE)
| Additive blending. Formula: `=SRC+DST`.
#define | CS_FX_ALPHA (CS_MIXMODE_BLEND(SRCALPHA, SRCALPHA_INV) | CS_MIXMODE_ALPHATEST_DISABLE)
| Alpha blending.
#define | CS_FX_COPY (CS_MIXMODE_TYPE_AUTO | CS_MIXMODE_ALPHATEST_AUTO)
| This mixmode uses alpha smooth blending, binary blending (ie enabled alpha test) and no blending depending on the contents of csRenderMesh::alphaMode.
#define | CS_FX_DESTALPHAADD (CS_MIXMODE_BLEND(DSTALPHA, ONE) | CS_MIXMODE_ALPHATEST_DISABLE)
| Multiply source color with destination alpha and add.
#define | CS_FX_FLAT (0x04000000)
| Flat shading flag.
#define | CS_FX_MASK_ALPHA (0x000000FF)
| Mixmode alpha part.
#define | CS_FX_MASK_MIXMODE (0xf0ff0000)
| Bit mask for bits relevant to mix mode comparison; contains type, alpha test flags and blending op factors.
#define | CS_FX_MESH (CS_MIXMODE_TYPE_MESH)
| Use the mix mode of the mesh mix mode.
#define | CS_FX_MULTIPLY (CS_MIXMODE_BLEND(DSTCOLOR, ZERO) | CS_MIXMODE_ALPHATEST_DISABLE)
| Multiplicative blending. Formula: `=SRC*DST`.
#define | CS_FX_MULTIPLY2 (CS_MIXMODE_BLEND(DSTCOLOR, SRCCOLOR) | CS_MIXMODE_ALPHATEST_DISABLE)
| Multiplicative doubling blending. Formula: `=2*SRC*DST`.
#define | CS_FX_PREMULTALPHA (CS_MIXMODE_BLEND(ONE, SRCALPHA_INV) | CS_MIXMODE_ALPHATEST_DISABLE)
| Multiply destination color with inverse source alpha and add source color.
#define | CS_FX_SRCALPHAADD (CS_MIXMODE_BLEND(SRCALPHA, ONE) | CS_MIXMODE_ALPHATEST_DISABLE)
| Multiply source color with source alpha and add.
#define | CS_FX_TRANSPARENT (CS_MIXMODE_BLEND(ZERO, ONE) | CS_MIXMODE_ALPHATEST_DISABLE)
| Transparent blending (keep framebuffer unmodified).
## Mix mode: alpha helpers
#define | CS_FX_SETALPHA(alpha) (CS_FX_ALPHA | uint ((alpha) * CS_FX_MASK_ALPHA))
| Macro for setting of alpha bits into mixmode (alpha between 0 and 1).
#define | CS_FX_SETALPHA_INT(alpha) (CS_FX_ALPHA | uint ((alpha) & CS_FX_MASK_ALPHA))
| Macro for setting of alpha bits into mixmode (alpha between 0 and 255).
## Light parameters
#define | CS_LIGHTPARAM_ATTENUATION 3
| Attenuation of the light.
#define | CS_LIGHTPARAM_DIFFUSE 1
| Diffuse color of the light.
#define | CS_LIGHTPARAM_POSITION 0
| Position of the light.
#define | CS_LIGHTPARAM_SPECULAR 2
| Specular color of the light.
## Mix mode: Alpha test flags
Enabled alpha test (or binary alpha) means that a fragment is only drawn when its alpha component is above a certain threshold, and discarded otherwise.
#define | CS_MIXMODE_ALPHATEST_AUTO (0x00000000)
| Automatic alpha test.
#define | CS_MIXMODE_ALPHATEST_DISABLE (0x20000000)
| Unconditionally disable alpha test.
#define | CS_MIXMODE_ALPHATEST_ENABLE (0x10000000)
| Unconditionally enable alpha test.
#define | CS_MIXMODE_ALPHATEST_MASK (0x30000000)
| Bit mask to extract the alpha test flag from a mixmode specifier.
## Mix mode: Blending mode helpers
#define | CS_MIXMODE_BLEND(Src, Dst)
| Helper macro to construct a blending operation mixmode Src and Dst are blending op factors , however sans the CS_MIXMODE_FACT_ prefix.
#define | CS_MIXMODE_BLENDOP_DST(mode) ((mode >> 16) & CS_MIXMODE_FACT_MASK)
| Helper macro to extract the `dstFactor` from a blending op mixmode.
#define | CS_MIXMODE_BLENDOP_SRC(mode) ((mode >> 20) & CS_MIXMODE_FACT_MASK)
| Helper macro to extract the `srcFactor` from a blending op mixmode.
## Mix mode: Types
The mix mode specifies how a shaded fragment (denoted as `SRC`) is mixed (or blended) with the framebuffer fragment (`DST`).
#define | CS_MIXMODE_TYPE_AUTO (0x00000000)
| Automatic blending mode.
#define | CS_MIXMODE_TYPE_BLENDOP (0x40000000)
| Blend with a blending operation.
#define | CS_MIXMODE_TYPE_MASK (0xc0000000)
| Bit mask to extract the type from a mixmode specifier.
#define | CS_MIXMODE_TYPE_MESH (0x80000000)
| Use the mix mode of the mesh mix mode.
## Shadow states
#define | CS_SHADOW_VOLUME_BEGIN 1
| Clear stencil.
#define | CS_SHADOW_VOLUME_FAIL1 4
| Setup for carmack's reverse pass 1.
#define | CS_SHADOW_VOLUME_FAIL2 5
| Setup for carmack's reverse pass 2.
#define | CS_SHADOW_VOLUME_FINISH 7
| Restore states.
#define | CS_SHADOW_VOLUME_PASS1 2
| Setup for pass 1.
#define | CS_SHADOW_VOLUME_PASS2 3
| Setup for pass 2.
#define | CS_SHADOW_VOLUME_USE 6
| Setup for shadow masking.
## iGraphics3D::BeginDraw() flags
#define | CSDRAW_2DGRAPHICS 0x00000001
| We're going to draw 2D graphics.
#define | CSDRAW_3DGRAPHICS 0x00000002
| We're going to draw 3D graphics.
#define | CSDRAW_CLEARSCREEN 0x00000020
| Clear frame buffer ?
#define | CSDRAW_CLEARZBUFFER 0x00000010
| Clear Z-buffer ?
## Defines
#define | CS_VATTRIB_GENERIC_FIRST 100
#define | CS_VATTRIB_GENERIC_LAST (CS_VATTRIB_GENERIC_FIRST + 15)
#define | CS_VATTRIB_IS_GENERIC(va) ((va >= CS_VATTRIB_GENERIC_FIRST) && (va <=CS_VATTRIB_GENERIC_LAST))
#define | CS_VATTRIB_IS_SPECIFIC(va) ((va >= CS_VATTRIB_SPECIFIC_FIRST) && (va <=CS_VATTRIB_SPECIFIC_LAST))
#define | CS_VATTRIB_SPECIFIC_FIRST 0
#define | CS_VATTRIB_SPECIFIC_LAST 15
## Enumerations
enum | { CS_MIXMODE_FACT_ZERO = 0x0, CS_MIXMODE_FACT_ONE = 0x1, CS_MIXMODE_FACT_SRCCOLOR = 0x2, CS_MIXMODE_FACT_SRCCOLOR_INV = 0x3, CS_MIXMODE_FACT_DSTCOLOR = 0x4, CS_MIXMODE_FACT_DSTCOLOR_INV = 0x5, CS_MIXMODE_FACT_SRCALPHA = 0x6, CS_MIXMODE_FACT_SRCALPHA_INV = 0x7, CS_MIXMODE_FACT_DSTALPHA = 0x8, CS_MIXMODE_FACT_DSTALPHA_INV = 0x9, CS_MIXMODE_FACT_COUNT = 0xa, CS_MIXMODE_FACT_MASK = 0xf }
| Mix mode: Blending op factors. More...
enum | csOpenPortalFlags { CS_OPENPORTAL_ZFILL = 0x00000004, CS_OPENPORTAL_MIRROR = 0x00000010, CS_OPENPORTAL_FLOAT = 0x00000040 }
| Flags to inform the renderer about properties of a portal when calling OpenPortal(). More...
enum | csRenderMeshType { CS_MESHTYPE_TRIANGLES, CS_MESHTYPE_QUADS, CS_MESHTYPE_TRIANGLESTRIP, CS_MESHTYPE_TRIANGLEFAN, CS_MESHTYPE_POINTS, CS_MESHTYPE_POINT_SPRITES, CS_MESHTYPE_LINES, CS_MESHTYPE_LINESTRIP }
| Primitive type of a mesh. More...
enum | csSimpleMeshFlags { csSimpleMeshScreenspace = 0x01 }
| Flags to influence the behaviour of DrawSimpleMesh(). More...
enum | csVertexAttrib { CS_VATTRIB_UNUSED = -2, CS_VATTRIB_INVALID = -1, CS_VATTRIB_POSITION = CS_VATTRIB_SPECIFIC_FIRST + 0, CS_VATTRIB_WEIGHT = CS_VATTRIB_SPECIFIC_FIRST + 1, CS_VATTRIB_NORMAL = CS_VATTRIB_SPECIFIC_FIRST + 2, CS_VATTRIB_COLOR = CS_VATTRIB_SPECIFIC_FIRST + 3, CS_VATTRIB_PRIMARY_COLOR = CS_VATTRIB_SPECIFIC_FIRST + 3, CS_VATTRIB_SECONDARY_COLOR = CS_VATTRIB_SPECIFIC_FIRST + 4, CS_VATTRIB_FOGCOORD = CS_VATTRIB_SPECIFIC_FIRST + 5, CS_VATTRIB_TEXCOORD = CS_VATTRIB_SPECIFIC_FIRST + 8, CS_VATTRIB_TEXCOORD0 = CS_VATTRIB_SPECIFIC_FIRST + 8, CS_VATTRIB_TEXCOORD1 = CS_VATTRIB_SPECIFIC_FIRST + 9, CS_VATTRIB_TEXCOORD2 = CS_VATTRIB_SPECIFIC_FIRST + 10, CS_VATTRIB_TEXCOORD3 = CS_VATTRIB_SPECIFIC_FIRST + 11, CS_VATTRIB_TEXCOORD4 = CS_VATTRIB_SPECIFIC_FIRST + 12, CS_VATTRIB_TEXCOORD5 = CS_VATTRIB_SPECIFIC_FIRST + 13, CS_VATTRIB_TEXCOORD6 = CS_VATTRIB_SPECIFIC_FIRST + 14, CS_VATTRIB_TEXCOORD7 = CS_VATTRIB_SPECIFIC_FIRST + 15, CS_VATTRIB_0 = CS_VATTRIB_GENERIC_FIRST + 0, CS_VATTRIB_1 = CS_VATTRIB_GENERIC_FIRST + 1, CS_VATTRIB_2 = CS_VATTRIB_GENERIC_FIRST + 2, CS_VATTRIB_3 = CS_VATTRIB_GENERIC_FIRST + 3, CS_VATTRIB_4 = CS_VATTRIB_GENERIC_FIRST + 4, CS_VATTRIB_5 = CS_VATTRIB_GENERIC_FIRST + 5, CS_VATTRIB_6 = CS_VATTRIB_GENERIC_FIRST + 6, CS_VATTRIB_7 = CS_VATTRIB_GENERIC_FIRST + 7, CS_VATTRIB_8 = CS_VATTRIB_GENERIC_FIRST + 8, CS_VATTRIB_9 = CS_VATTRIB_GENERIC_FIRST + 9, CS_VATTRIB_10 = CS_VATTRIB_GENERIC_FIRST + 10, CS_VATTRIB_11 = CS_VATTRIB_GENERIC_FIRST + 11, CS_VATTRIB_12 = CS_VATTRIB_GENERIC_FIRST + 12, CS_VATTRIB_13 = CS_VATTRIB_GENERIC_FIRST + 13, CS_VATTRIB_14 = CS_VATTRIB_GENERIC_FIRST + 14 }
| Vertex attributes. More...
enum | csZBufMode { CS_ZBUF_NONE = 0x00000000, CS_ZBUF_FILL = 0x00000001, CS_ZBUF_TEST = 0x00000002, CS_ZBUF_USE = 0x00000003, CS_ZBUF_EQUAL = 0x00000004, CS_ZBUF_INVERT = 0x00000005, CS_ZBUF_MESH = 0x80000000, CS_ZBUF_MESH2 = 0x80000001 }
| Z-buffer modes. More...
enum | G3D_RENDERSTATEOPTION { G3DRENDERSTATE_ZBUFFERMODE, G3DRENDERSTATE_DITHERENABLE, G3DRENDERSTATE_BILINEARMAPPINGENABLE, G3DRENDERSTATE_TRILINEARMAPPINGENABLE, G3DRENDERSTATE_TRANSPARENCYENABLE, G3DRENDERSTATE_MIPMAPENABLE, G3DRENDERSTATE_TEXTUREMAPPINGENABLE, G3DRENDERSTATE_LIGHTINGENABLE, G3DRENDERSTATE_INTERLACINGENABLE, G3DRENDERSTATE_MMXENABLE, G3DRENDERSTATE_INTERPOLATIONSTEP, G3DRENDERSTATE_MAXPOLYGONSTODRAW, G3DRENDERSTATE_GOURAUDENABLE, G3DRENDERSTATE_EDGES }
| Graphics3D render state options. More...

## Detailed Description

3D graphics interface

Definition in file graph3d.h.

## Define Documentation

#define CS_LIGHTPARAM_ATTENUATION 3

Attenuation of the light.

Definition at line 451 of file graph3d.h.

#define CS_LIGHTPARAM_DIFFUSE 1

Diffuse color of the light.

Definition at line 447 of file graph3d.h.

#define CS_LIGHTPARAM_POSITION 0

Position of the light.

Definition at line 445 of file graph3d.h.

#define CS_LIGHTPARAM_SPECULAR 2

Specular color of the light.

Definition at line 449 of file graph3d.h.

#define CS_SHADOW_VOLUME_BEGIN 1

Clear stencil.

Definition at line 457 of file graph3d.h.

#define CS_SHADOW_VOLUME_FAIL1 4

Setup for carmack's reverse pass 1.

Definition at line 463 of file graph3d.h.

#define CS_SHADOW_VOLUME_FAIL2 5

Setup for carmack's reverse pass 2.

Definition at line 465 of file graph3d.h.

#define CS_SHADOW_VOLUME_FINISH 7

Restore states.

Definition at line 469 of file graph3d.h.

#define CS_SHADOW_VOLUME_PASS1 2

Setup for pass 1.

Definition at line 459 of file graph3d.h.

#define CS_SHADOW_VOLUME_PASS2 3

Setup for pass 2.

Definition at line 461 of file graph3d.h.

#define CS_SHADOW_VOLUME_USE 6

Setup for shadow masking.

Definition at line 467 of file graph3d.h.

## Enumeration Type Documentation

enum csOpenPortalFlags

Flags to inform the renderer about properties of a portal when calling OpenPortal().

Enumerator:

  CS_OPENPORTAL_ZFILL | If this flag is set then renderer must do a Z-fill after rendering the portal contents. This is mainly useful for floating portals where it is possible that there is geometry in the same sector that will be rendered behind the portal (and does could accidently get written in the portal sector because the Z-buffer cannot be trusted).
  CS_OPENPORTAL_MIRROR | If this flag is set then this portal mirrors space (changes order of the vertices of polygons).
  CS_OPENPORTAL_FLOAT | If this flag is used then the portal must use possible available stencil buffer on the hardware to do good clipping. This flag should be used if you have a portal that is not at the boundary of the sector and that can be covered (or itself covers) other objects. It is usually used in combination with CS_OPENPORTAL_ZFILL.

Definition at line 589 of file graph3d.h.

enum csRenderMeshType

Primitive type of a mesh.

Enumerator:

  CS_MESHTYPE_TRIANGLES | Triangles.
  CS_MESHTYPE_QUADS | Quads.
  CS_MESHTYPE_TRIANGLESTRIP | Triangle strip. The OpenGL spec describes it pretty well: "A triangle strip is a series of triangles connected along shared edges. A triangle strip is specified by giving a series of defining vertices [...]. In this case, the first three vertices define the first triangle [...]. Each subsequent vertex defines a new triangle using that point along with two vertices from the previous triangle."
  CS_MESHTYPE_TRIANGLEFAN | Triangle fan. Similar to a triangle strip, however, a triangle is always defined with the first, previously added and the recently added vertex.
  CS_MESHTYPE_POINTS | Points.
  CS_MESHTYPE_POINT_SPRITES | Point sprites. Note: only supported if the SupportsPointSprites member of the csGraphics3DCaps structure for this renderer is true.
  CS_MESHTYPE_LINES | Lines.
  CS_MESHTYPE_LINESTRIP | Line strip. A line is defined from the prebviously and recently added vertex.

Definition at line 528 of file graph3d.h.

enum csSimpleMeshFlags

Flags to influence the behaviour of DrawSimpleMesh().

Enumerator:

  csSimpleMeshScreenspace | Ignore the object2camera transform in the csSimpleRenderMesh struct and replace it with a transformation that effectively lets you specify the vertices in screen space. The Z components of the mesh vertices should be set to 0 when this flag is specified.

Definition at line 574 of file graph3d.h.

enum G3D_RENDERSTATEOPTION

Graphics3D render state options.

Enumerator:

  G3DRENDERSTATE_ZBUFFERMODE | Set Z-buffer fill/test/use mode (parameter is a csZBufMode).
  G3DRENDERSTATE_DITHERENABLE | Enable/disable dithering (parameter is a bool).
  G3DRENDERSTATE_BILINEARMAPPINGENABLE | Enable/disable bi-linear mapping (parameter is a bool).
  G3DRENDERSTATE_TRILINEARMAPPINGENABLE | Enable/disable tri-linear mapping (parameter is a bool).
  G3DRENDERSTATE_TRANSPARENCYENABLE | Enable/disable transparent textures (parameter is a bool).
  G3DRENDERSTATE_MIPMAPENABLE | Enable/disable mip-mapping (parameter is a bool).
  G3DRENDERSTATE_TEXTUREMAPPINGENABLE | Enable/disable textures (parameter is a bool).
  G3DRENDERSTATE_LIGHTINGENABLE | Enable/disable lighting (parameter is a bool).
  G3DRENDERSTATE_INTERLACINGENABLE | Enable/disable interlacing (parameter is a bool).
  G3DRENDERSTATE_MMXENABLE | Enable/disable MMX instructions usage (parameter is a bool).
  G3DRENDERSTATE_INTERPOLATIONSTEP | Set perspective-correction interpolation step (parameter is a int).
  G3DRENDERSTATE_MAXPOLYGONSTODRAW | Set maximal number of polygons per frame to draw (parameter is a int).
  G3DRENDERSTATE_GOURAUDENABLE | Enable/disable Gouraud shading (parameter is a bool).
  G3DRENDERSTATE_EDGES | Enable/disable edge drawing (debugging) (parameter is a bool).

Definition at line 473 of file graph3d.h.