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Fix a few places in examples where C reference implementaion had a double-precision

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fp constant undesirably causing computation to be done in double precision.

Makes C scalar versions of the options pricing models, rt, and aobench 3-5% faster.
Makes scalar version of noise about 15% faster.
Others are unchanged.
This commit is contained in:
Matt Pharr
2011-09-01 16:31:22 -07:00
parent eb7913f1dd
commit 99221f7d17
6 changed files with 24 additions and 24 deletions
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14
examples/volume_rendering/volume_serial.cpp
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@@ -104,7 +104,7 @@ Inside(float3 p, float3 pMin, float3 pMax) {
static bool
IntersectP(const Ray &ray, float3 pMin, float3 pMax, float *hit0, float *hit1) {
float t0 = -1e30, t1 = 1e30;
float t0 = -1e30f, t1 = 1e30f;
float3 tNear = (pMin - ray.origin) / ray.dir;
float3 tFar = (pMax - ray.origin) / ray.dir;
@@ -213,7 +213,7 @@ transmittance(float3 p0, float3 p1, float3 pMin,
float tau = 0;
float rayLength = sqrtf(ray.dir.x * ray.dir.x + ray.dir.y * ray.dir.y +
ray.dir.z * ray.dir.z);
float stepDist = 0.2;
float stepDist = 0.2f;
float stepT = stepDist / rayLength;
float t = rayT0;
@@ -239,8 +239,8 @@ distanceSquared(float3 a, float3 b) {
static float
raymarch(float density[], int nVoxels[3], const Ray &ray) {
float rayT0, rayT1;
float3 pMin(.3, -.2, .3), pMax(1.8, 2.3, 1.8);
float3 lightPos(-1, 4, 1.5);
float3 pMin(.3f, -.2f, .3f), pMax(1.8f, 2.3f, 1.8f);
float3 lightPos(-1f, 4f, 1.5f);
if (!IntersectP(ray, pMin, pMax, &rayT0, &rayT1))
return 0.;
@@ -249,10 +249,10 @@ raymarch(float density[], int nVoxels[3], const Ray &ray) {
// Parameters that define the volume scattering characteristics and
// sampling rate for raymarching
float Le = .25; // Emission coefficient
float Le = .25f; // Emission coefficient
float sigma_a = 10; // Absorption coefficient
float sigma_s = 10; // Scattering coefficient
float stepDist = 0.025; // Ray step amount
float stepDist = 0.025f; // Ray step amount
float lightIntensity = 40; // Light source intensity
float tau = 0.f; // accumulated beam transmittance
@@ -269,7 +269,7 @@ raymarch(float density[], int nVoxels[3], const Ray &ray) {
// terminate once attenuation is high
float atten = expf(-tau);
if (atten < .005)
if (atten < .005f)
break;
// direct lighting