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Fix for misaligned color/material textures when resolution is greater than the

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height map.
This commit is contained in:
Andrzej Kapolka 2015-01-20 13:07:35 -08:00
parent f7f480cee4
commit b4cd13f0be
3 changed files with 16 additions and 4 deletions
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2
interface/resources/shaders/metavoxel_heightfield_base.vert
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@ -43,5 +43,5 @@ void main(void) {
gl_FrontColor = vec4(1.0, 1.0, 1.0, step(height, 0.0));
// pass along the scaled/offset texture coordinates
gl_TexCoord[0] = vec4((heightCoord - heightScale.st) * colorScale, 0.0, 1.0);
gl_TexCoord[0] = vec4((heightCoord - vec2(0.5, 0.5)) * colorScale + vec2(0.5, 0.5), 0.0, 1.0);
}

2
interface/resources/shaders/metavoxel_heightfield_splat.vert
View file

@ -58,7 +58,7 @@ void main(void) {
gl_TexCoord[3] = textureSpacePosition * vec4(splatTextureScalesS[3], splatTextureScalesT[3], 0.0, 1.0);
// compute the alpha values for each texture
float value = texture2D(textureMap, (gl_MultiTexCoord0.st - heightScale) * textureScale).r;
float value = texture2D(textureMap, (gl_MultiTexCoord0.st - vec2(0.5, 0.5)) * textureScale + vec2(0.5, 0.5)).r;
vec4 valueVector = vec4(value, value, value, value);
alphaValues = step(textureValueMinima, valueVector) * step(valueVector, textureValueMaxima);
}

16
interface/src/MetavoxelSystem.cpp
View file

@ -2407,7 +2407,14 @@ void HeightfieldNodeRenderer::render(const HeightfieldNodePointer& node, const g
baseBatch.heightTextureID = _heightTextureID;
baseBatch.heightScale = glm::vec4(1.0f / width, 1.0f / height, (innerWidth - 1) / -2.0f, (innerHeight - 1) / -2.0f);
baseBatch.colorTextureID = _colorTextureID;
baseBatch.colorScale = glm::vec2((float)width / innerWidth, (float)height / innerHeight);
float widthMultiplier = 1.0f / (0.5f - 1.5f / width);
float heightMultiplier = 1.0f / (0.5f - 1.5f / height);
if (node->getColor()) {
int colorWidth = node->getColor()->getWidth();
int colorHeight = node->getColor()->getContents().size() / (colorWidth * DataBlock::COLOR_BYTES);
baseBatch.colorScale = glm::vec2((0.5f - 0.5f / colorWidth) * widthMultiplier,
(0.5f - 0.5f / colorHeight) * heightMultiplier);
}
Application::getInstance()->getMetavoxels()->addHeightfieldBaseBatch(baseBatch);
if (!(cursor || _networkTextures.isEmpty())) {
@ -2422,7 +2429,12 @@ void HeightfieldNodeRenderer::render(const HeightfieldNodePointer& node, const g
splatBatch.heightTextureID = _heightTextureID;
splatBatch.heightScale = glm::vec4(1.0f / width, 1.0f / height, 0.0f, 0.0f);
splatBatch.materialTextureID = _materialTextureID;
splatBatch.textureScale = glm::vec2((float)width / innerWidth, (float)height / innerHeight);
if (node->getMaterial()) {
int materialWidth = node->getMaterial()->getWidth();
int materialHeight = node->getMaterial()->getContents().size() / materialWidth;
splatBatch.textureScale = glm::vec2((0.5f - 0.5f / materialWidth) * widthMultiplier,
(0.5f - 0.5f / materialHeight) * heightMultiplier);
}
splatBatch.splatTextureOffset = glm::vec2(
glm::dot(translation, rotation * glm::vec3(1.0f, 0.0f, 0.0f)) / scale.x,
glm::dot(translation, rotation * glm::vec3(0.0f, 0.0f, 1.0f)) / scale.z);