guPerspective

Syntax

#include "gu.h"
void guPerspective(Mtx m,
   u16 *perspNorm,
   float fovy, float aspect,
   float near, float far, float scale)

Arguments

• m is the resulting 4x4 projection matrix

• perspNorm is the pointer to the value to use with the gSPPerspNormalize function

• fovy is field of view angle, in degrees, in the y direction

• aspect is the aspect ratio that determines the field of view in the x direction. The aspect ratio is the ratio of x (width) to y (height) of the viewport region

• near, far specify the distance from the viewer to the near and far clipping plane (always positive)

• scale gives the scale of each element of the matrix. You can use it to improve precision in the RSP fixed-point arithmetic

Explanation
It computes and returns a 4x4 fixed-point perspective projection matrix (m) and a number to use with the gSPPerspNormalize function. For a detailed description of the fixed-point matrix format, see gSPMatrix.

See Also
guPerspectiveF
guFrustum
guOrtho
gSPMatrix
gSPPerspNormalize
gluPerspective(3G)

Nintendo® Confidential Warning: all information in this document is confidential and covered by a non-disclosure agreement. You are responsible for keeping this information confidential and protected. Nintendo will vigorously enforce this responsibility. Copyright © 1998 Nintendo of America Inc. All rights reserved Nintendo and N64 are registered trademarks of Nintendo Last Updated April, 1999