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#5812 - Use refdef's coordinates when drawing to screen shadow fbo, and separate depth texture and screen texture coordinates in glsl shaders.

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This commit is contained in:
James Canete 2012-12-06 01:55:45 +00:00
parent 736e1d5170
commit 374c551404
5 changed files with 33 additions and 32 deletions
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7
code/rend2/glsl/lightall_fp.glsl
View file

@ -63,10 +63,6 @@ varying vec3 var_VertLight;
varying vec3 var_WorldLight;
#endif
#if defined(USE_LIGHT_VECTOR) && !defined(USE_FAST_LIGHT) && defined(USE_SHADOWMAP)
varying vec4 var_ScreenPos;
#endif
#define EPSILON 0.00000001
#if defined(USE_PARALLAXMAP)
@ -228,8 +224,7 @@ void main()
vec3 ambientLight = u_AmbientLight;
#if defined(USE_SHADOWMAP)
//vec2 shadowTex = gl_FragCoord.xy * r_FBufScale;
vec2 shadowTex = var_ScreenPos.xy / var_ScreenPos.w;
vec2 shadowTex = gl_FragCoord.xy * r_FBufScale;
directedLight *= texture2D(u_ShadowMap, shadowTex).r;
#endif
#elif defined(USE_LIGHT_VERTEX) && !defined(USE_FAST_LIGHT)

8
code/rend2/glsl/lightall_vp.glsl
View file

@ -92,10 +92,6 @@ varying vec3 var_VertLight;
varying vec3 var_WorldLight;
#endif
#if defined(USE_LIGHT_VECTOR) && !defined(USE_FAST_LIGHT) && defined(USE_SHADOWMAP)
varying vec4 var_ScreenPos;
#endif
#if defined(USE_TCMOD)
vec2 ModTexCoords(vec2 st, vec3 position, vec4 texMatrix, vec4 offTurb)
{
@ -133,10 +129,6 @@ void main()
gl_Position = u_ModelViewProjectionMatrix * position;
#if defined(USE_LIGHT_VECTOR) && !defined(USE_FAST_LIGHT) && defined(USE_SHADOWMAP)
var_ScreenPos = gl_Position + vec2(1.0, 0.0).xxyx * gl_Position.w;
#endif
#if (defined(USE_LIGHTMAP) || defined(USE_LIGHT_VERTEX)) && !defined(USE_DELUXEMAP) && !defined(USE_FAST_LIGHT)
vec3 worldLight = attr_LightDirection;
#endif

6
code/rend2/glsl/shadowmask_fp.glsl
View file

@ -15,7 +15,7 @@ uniform mat4 u_ShadowMvp3;
uniform vec3 u_ViewOrigin;
uniform vec4 u_ViewInfo; // zfar / znear, zfar
varying vec2 var_ScreenTex;
varying vec2 var_DepthTex;
varying vec3 var_ViewDir;
// Input: It uses texture coords as the random number seed.
@ -41,7 +41,7 @@ float PCF(const sampler2D shadowmap, const vec2 st, const float dist)
float scale = 2.0 / r_shadowMapSize;
#if defined(USE_SHADOW_FILTER)
float r = random(var_ScreenTex.xy);
float r = random(var_DepthTex.xy);
float sinr = sin(r) * scale;
float cosr = cos(r) * scale;
mat2 rmat = mat2(cosr, sinr, -sinr, cosr);
@ -78,7 +78,7 @@ void main()
{
float result;
float depth = getLinearDepth(u_ScreenDepthMap, var_ScreenTex, u_ViewInfo.x);
float depth = getLinearDepth(u_ScreenDepthMap, var_DepthTex, u_ViewInfo.x);
float sampleZ = u_ViewInfo.y * depth;
vec4 biasPos = vec4(u_ViewOrigin + var_ViewDir * depth * 0.99, 1.0);

8
code/rend2/glsl/shadowmask_vp.glsl
View file

@ -6,15 +6,13 @@ uniform vec3 u_ViewLeft;
uniform vec3 u_ViewUp;
uniform vec4 u_ViewInfo; // zfar / znear
varying vec2 var_ScreenTex;
varying vec2 var_DepthTex;
varying vec3 var_ViewDir;
void main()
{
gl_Position = attr_Position;
//vec2 screenCoords = gl_Position.xy / gl_Position.w;
//var_ScreenTex = screenCoords * 0.5 + 0.5;
var_ScreenTex = attr_TexCoord0.xy;
vec2 screenCoords = attr_TexCoord0.xy * 2.0 - 1.0;
vec2 screenCoords = gl_Position.xy / gl_Position.w;
var_DepthTex = attr_TexCoord0.xy;
var_ViewDir = u_ViewForward + u_ViewLeft * -screenCoords.x + u_ViewUp * screenCoords.y;
}

36
code/rend2/tr_backend.c
View file

@ -1245,21 +1245,37 @@ const void *RB_DrawSurfs( const void *data ) {
{
vec4_t quadVerts[4];
vec2_t texCoords[4];
vec4_t box;
FBO_Bind(tr.screenShadowFbo);
qglViewport(0, 0, tr.screenShadowFbo->width, tr.screenShadowFbo->height);
qglScissor(0, 0, tr.screenShadowFbo->width, tr.screenShadowFbo->height);
box[0] = (backEnd.refdef.x ) * tr.screenShadowFbo->width / (float)glConfig.vidWidth;
box[1] = (backEnd.refdef.y ) * tr.screenShadowFbo->height / (float)glConfig.vidHeight;
box[2] = (backEnd.refdef.width ) * tr.screenShadowFbo->width / (float)glConfig.vidWidth;
box[3] = (backEnd.refdef.height) * tr.screenShadowFbo->height / (float)glConfig.vidHeight;
VectorSet4(quadVerts[0], -1, 1, 0, 1);
VectorSet4(quadVerts[1], 1, 1, 0, 1);
VectorSet4(quadVerts[2], 1, -1, 0, 1);
VectorSet4(quadVerts[3], -1, -1, 0, 1);
qglViewport(box[0], box[1], box[2], box[3]);
qglScissor(box[0], box[1], box[2], box[3]);
texCoords[0][0] = 0; texCoords[0][1] = 1;
texCoords[1][0] = 1; texCoords[1][1] = 1;
texCoords[2][0] = 1; texCoords[2][1] = 0;
texCoords[3][0] = 0; texCoords[3][1] = 0;
box[0] = (backEnd.refdef.x ) / (float)glConfig.vidWidth;
box[1] = (backEnd.refdef.y ) / (float)glConfig.vidHeight;
box[2] = (backEnd.refdef.x + backEnd.refdef.width ) / (float)glConfig.vidWidth;
box[3] = (backEnd.refdef.y + backEnd.refdef.height) / (float)glConfig.vidHeight;
texCoords[0][0] = box[0]; texCoords[0][1] = box[3];
texCoords[1][0] = box[2]; texCoords[1][1] = box[3];
texCoords[2][0] = box[2]; texCoords[2][1] = box[1];
texCoords[3][0] = box[0]; texCoords[3][1] = box[1];
box[0] = -1.0f;
box[1] = -1.0f;
box[2] = 1.0f;
box[3] = 1.0f;
VectorSet4(quadVerts[0], box[0], box[3], 0, 1);
VectorSet4(quadVerts[1], box[2], box[3], 0, 1);
VectorSet4(quadVerts[2], box[2], box[1], 0, 1);
VectorSet4(quadVerts[3], box[0], box[1], 0, 1);
GL_State( GLS_DEPTHTEST_DISABLE );