Functions to generate and render spheres. More...

#include "r_local.h"
#include "r_sphere.h"
#include "r_error.h"
#include "r_geoscape.h"

Include dependency graph for r_sphere.cpp:

Functions
static float	rhoSpiral (const int index, const float deltaRho, const float thetaAngle)
void	R_SphereGenerate (sphere_t *sphere, const int tris, const float radius)
	Initialize the globe chain arrays.
void	R_SphereInit (void)
	Creates the spheres we need for rendering the 3d globe.
static void	R_SphereActivateTextureUnit (gltexunit_t texunit, void texCoordBuffer)
static void	R_SphereDeactivateTextureUnit (gltexunit_t *texunit)
static void	R_SphereRenderTris (const sphere_t *sphere)
static bool	R_SphereCheckGLSL (const sphere_t *sphere)
static void	R_SphereShade (const sphere_t *sphere)
	render sphere using standard OpenGL lighting
static void	R_SphereShadeGLSL (const sphere_t *sphere)
	render sphere using GLSL (bump mapping, specularity, and season-blending)
void	R_SphereRender (const sphere_t *sphere, const vec3_t pos, const vec3_t rotate, const float scale, const vec4_t lightPos)
	Draw the sphere.

Variables
static cvar_t *	r_sphereDetails
sphere_t	r_globeEarth
sphere_t	r_globeMoon
sphere_t	r_globeEarthAtmosphere

Detailed Description

Functions to generate and render spheres.

Definition in file r_sphere.cpp.

Function Documentation

◆ R_SphereActivateTextureUnit()

void R_SphereActivateTextureUnit	(	gltexunit_t *	texunit,
		void *	texCoordBuffer )

inlinestatic

Definition at line 131 of file r_sphere.cpp.

References R_BindArray(), and R_SelectTexture().

Referenced by R_SphereShadeGLSL().

◆ R_SphereCheckGLSL()

bool R_SphereCheckGLSL ( const sphere_t * sphere )

inlinestatic

Parameters

sphere The sphere to check

Returns: true if all needed data is loaded to use the geoscape glsl shaders, false otherwise

Definition at line 162 of file r_sphere.cpp.

References sphere_t::glslProgram, and r_programs.

Referenced by R_SphereRender().

◆ R_SphereDeactivateTextureUnit()

void R_SphereDeactivateTextureUnit ( gltexunit_t * texunit )

inlinestatic

Definition at line 138 of file r_sphere.cpp.

References R_BindDefaultArray(), and R_SelectTexture().

Referenced by R_SphereShadeGLSL().

◆ R_SphereGenerate()

void R_SphereGenerate	(	sphere_t *	sphere,
		const int	tris,
		const float	radius )

Initialize the globe chain arrays.

Parameters

[out]	sphere	The sphere you want to create
[in]	tris	The amount of tris the globe should have - the higher the number the higher the details. tris*tris triangles are obtained.
[in]	radius	The radius of the sphere

See also: R_Draw3DGlobe

< angle from the pole (z-axis)

< angle around the equator, from y-axis

Definition at line 51 of file r_sphere.cpp.

References sphere_t::glslProgram, i, M_PI, Mem_PoolAllocTypeN, sphere_t::normals, sphere_t::num_tris, rhoSpiral(), sphere_t::texes, Vector2Set, VectorNormalize2(), VectorSet, sphere_t::verts, and vid_genericPool.

Referenced by R_SphereInit().

◆ R_SphereInit()

void R_SphereInit ( void )

Creates the spheres we need for rendering the 3d globe.

Note: The moon sphere has less detail because it's smaller in the scene; The sizes are arbitrary, becasue we use orthographic projection. The real sizes are: lunarRadius = 0.273 * earthRadius, solarRadius = 110.0 * earthRadius

See also: R_Init

Definition at line 119 of file r_sphere.cpp.

References CVAR_ARCHIVE, Cvar_Get(), Cvar_SetValue(), EARTH_RADIUS, MOON_RADIUS, r_globeEarth, r_globeEarthAtmosphere, r_globeMoon, r_sphereDetails, and R_SphereGenerate().

Referenced by R_Init().

◆ R_SphereRender()

void R_SphereRender	(	const sphere_t *	sphere,
		const vec3_t	pos,
		const vec3_t	rotate,
		const float	scale,
		const vec4_t	lightPos )

Draw the sphere.

Parameters

[in]	sphere	The sphere that should be rendered
[in]	pos	The position (translation) of the matrix
[in]	rotate	The rotation of the matrix
[in]	scale	The scale of the matrix
[in]	lightPos	Set this to nullptr if you don't want to change the light position