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Merge pull request #2936 from ey6es/master

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A couple more shadow tweaks: reduce "shimmer" by moving in texel increments, use multisampling on voxels as well as models.
This commit is contained in:
Philip Rosedale 2014-05-27 18:28:03 -07:00
commit c52592311f
2 changed files with 14 additions and 1 deletions
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9
interface/resources/shaders/shadow_map.frag
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@ -13,8 +13,15 @@
uniform sampler2DShadow shadowMap;
// the inverse of the size of the shadow map
const float shadowScale = 1.0 / 2048.0;
varying vec4 shadowColor;
void main(void) {
gl_FragColor = mix(shadowColor, gl_Color, shadow2D(shadowMap, gl_TexCoord[0].stp));
gl_FragColor = mix(shadowColor, gl_Color, 0.25 *
(shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(-shadowScale, -shadowScale, 0.0)).r +
shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(-shadowScale, shadowScale, 0.0)).r +
shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(shadowScale, -shadowScale, 0.0)).r +
shadow2D(shadowMap, gl_TexCoord[0].stp + vec3(shadowScale, shadowScale, 0.0)).r));
}

6
interface/src/Application.cpp
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@ -2291,6 +2291,12 @@ void Application::updateShadowMap() {
radius = qMax(radius, glm::distance(points[i], center));
}
center = inverseRotation * center;
// to reduce texture "shimmer," move in texel increments
float texelSize = (2.0f * radius) / fbo->width();
center = glm::vec3(roundf(center.x / texelSize) * texelSize, roundf(center.y / texelSize) * texelSize,
roundf(center.z / texelSize) * texelSize);
glm::vec3 minima(center.x - radius, center.y - radius, center.z - radius);
glm::vec3 maxima(center.x + radius, center.y + radius, center.z + radius);