This program performs shadow projection using texture coordinate generation and a two-pass rendering method. A shadow pattern is rendered along the first path. Next, the frame buffer is copy output as a texture. For the second path, this shadow texture is projected onto the floor. This demo shows a scene of a torus object shadow.
| Functions | Parameters | Description |
GXLoadTexMtxImm |
Matrices | Appropriate projection matrix. |
| Matrix destination. | GX_TEXMTX1 |
|
| Types | GX_MTX3x4 |
|
GXSetNumTexGens |
number of texture coordinates. | 0, 1 |
GXSetTexCoordGen |
Destination coordinates. | GX_TEXCOORD1 |
| Generation type. | GX_TG_MTX3x4 |
|
| Generation source. | GX_TG_POS |
|
| Matrix source. | GX_TEXMTX1 |
|
GXInitTexObj |
Pointer to image data. | Appropriate value. |
| Width and height | Appropriate value. | |
| Format | GX_TF_IA4, GX_TF_RGB5A3 |
|
| Wrap mode (s, t). | GX_CLAMP, GX_REPEAT. |
|
| Mipmap | Always GX_FALSE. |
|
|
Destination texture name. | GX_TEXMAP0, GX_TEXMAP1 |
GXInvalidateTexAll |
(No parameter) | |
GXSetTexCopySrc |
top / left / width / height | Only fixed size. |
GXSetTexCopyDst |
Width and height | Only fixed size. |
| Format | Always GX_TF_IA4. |
|
| Mipmap filter | GX_TRUE |
|
GXCopyTex |
Pointer to image data. | Appropriate value. |
| Clear operation | GX_TRUE |
|
GXSetCopyClear |
Color | Only one color. |
| Z value | Always 0xFFFFFF. | |
GXSetTevOp |
TEV stage ID. | GX_TEVSTAGE0, GX_TEVSTAGE1. |
| Operation mode | GX_MODULATE for stage0, GX_DECAL for stage1 |
|
GXSetPixelFmt |
Pixel Format | |
| Z compression format | Always GX_ZC_LINEAR. |
|
GXPixModeSync |
(No parameter) |
START exits the test.
The Control Stick moves camera position. The C Stick moves light position. The A Button starts or stops the spinning animation of the torus object.
$REVOLUTION_SDK_ROOT/dvddata/gxTextrs.tpl
2006/03/01 Initial version.
CONFIDENTIAL