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path: root/intern/cycles/kernel/closure/bsdf_phong_ramp.h
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-rw-r--r--intern/cycles/kernel/closure/bsdf_phong_ramp.h171
1 files changed, 92 insertions, 79 deletions
diff --git a/intern/cycles/kernel/closure/bsdf_phong_ramp.h b/intern/cycles/kernel/closure/bsdf_phong_ramp.h
index 83da05ac435..b6fd0e68681 100644
--- a/intern/cycles/kernel/closure/bsdf_phong_ramp.h
+++ b/intern/cycles/kernel/closure/bsdf_phong_ramp.h
@@ -38,105 +38,118 @@ CCL_NAMESPACE_BEGIN
#ifdef __OSL__
typedef ccl_addr_space struct PhongRampBsdf {
- SHADER_CLOSURE_BASE;
+ SHADER_CLOSURE_BASE;
- float exponent;
- float3 *colors;
+ float exponent;
+ float3 *colors;
} PhongRampBsdf;
ccl_device float3 bsdf_phong_ramp_get_color(const float3 colors[8], float pos)
{
- int MAXCOLORS = 8;
-
- float npos = pos * (float)(MAXCOLORS - 1);
- int ipos = float_to_int(npos);
- if(ipos < 0)
- return colors[0];
- if(ipos >= (MAXCOLORS - 1))
- return colors[MAXCOLORS - 1];
- float offset = npos - (float)ipos;
- return colors[ipos] * (1.0f - offset) + colors[ipos+1] * offset;
+ int MAXCOLORS = 8;
+
+ float npos = pos * (float)(MAXCOLORS - 1);
+ int ipos = float_to_int(npos);
+ if (ipos < 0)
+ return colors[0];
+ if (ipos >= (MAXCOLORS - 1))
+ return colors[MAXCOLORS - 1];
+ float offset = npos - (float)ipos;
+ return colors[ipos] * (1.0f - offset) + colors[ipos + 1] * offset;
}
ccl_device int bsdf_phong_ramp_setup(PhongRampBsdf *bsdf)
{
- bsdf->type = CLOSURE_BSDF_PHONG_RAMP_ID;
- bsdf->exponent = max(bsdf->exponent, 0.0f);
- return SD_BSDF|SD_BSDF_HAS_EVAL;
+ bsdf->type = CLOSURE_BSDF_PHONG_RAMP_ID;
+ bsdf->exponent = max(bsdf->exponent, 0.0f);
+ return SD_BSDF | SD_BSDF_HAS_EVAL;
}
-ccl_device float3 bsdf_phong_ramp_eval_reflect(const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf)
+ccl_device float3 bsdf_phong_ramp_eval_reflect(const ShaderClosure *sc,
+ const float3 I,
+ const float3 omega_in,
+ float *pdf)
{
- const PhongRampBsdf *bsdf = (const PhongRampBsdf*)sc;
- float m_exponent = bsdf->exponent;
- float cosNI = dot(bsdf->N, omega_in);
- float cosNO = dot(bsdf->N, I);
-
- if(cosNI > 0 && cosNO > 0) {
- // reflect the view vector
- float3 R = (2 * cosNO) * bsdf->N - I;
- float cosRI = dot(R, omega_in);
- if(cosRI > 0) {
- float cosp = powf(cosRI, m_exponent);
- float common = 0.5f * M_1_PI_F * cosp;
- float out = cosNI * (m_exponent + 2) * common;
- *pdf = (m_exponent + 1) * common;
- return bsdf_phong_ramp_get_color(bsdf->colors, cosp) * out;
- }
- }
-
- return make_float3(0.0f, 0.0f, 0.0f);
+ const PhongRampBsdf *bsdf = (const PhongRampBsdf *)sc;
+ float m_exponent = bsdf->exponent;
+ float cosNI = dot(bsdf->N, omega_in);
+ float cosNO = dot(bsdf->N, I);
+
+ if (cosNI > 0 && cosNO > 0) {
+ // reflect the view vector
+ float3 R = (2 * cosNO) * bsdf->N - I;
+ float cosRI = dot(R, omega_in);
+ if (cosRI > 0) {
+ float cosp = powf(cosRI, m_exponent);
+ float common = 0.5f * M_1_PI_F * cosp;
+ float out = cosNI * (m_exponent + 2) * common;
+ *pdf = (m_exponent + 1) * common;
+ return bsdf_phong_ramp_get_color(bsdf->colors, cosp) * out;
+ }
+ }
+
+ return make_float3(0.0f, 0.0f, 0.0f);
}
-ccl_device float3 bsdf_phong_ramp_eval_transmit(const ShaderClosure *sc, const float3 I, const float3 omega_in, float *pdf)
+ccl_device float3 bsdf_phong_ramp_eval_transmit(const ShaderClosure *sc,
+ const float3 I,
+ const float3 omega_in,
+ float *pdf)
{
- return make_float3(0.0f, 0.0f, 0.0f);
+ return make_float3(0.0f, 0.0f, 0.0f);
}
-ccl_device int bsdf_phong_ramp_sample(const ShaderClosure *sc, float3 Ng, float3 I, float3 dIdx, float3 dIdy, float randu, float randv, float3 *eval, float3 *omega_in, float3 *domega_in_dx, float3 *domega_in_dy, float *pdf)
+ccl_device int bsdf_phong_ramp_sample(const ShaderClosure *sc,
+ float3 Ng,
+ float3 I,
+ float3 dIdx,
+ float3 dIdy,
+ float randu,
+ float randv,
+ float3 *eval,
+ float3 *omega_in,
+ float3 *domega_in_dx,
+ float3 *domega_in_dy,
+ float *pdf)
{
- const PhongRampBsdf *bsdf = (const PhongRampBsdf*)sc;
- float cosNO = dot(bsdf->N, I);
- float m_exponent = bsdf->exponent;
-
- if(cosNO > 0) {
- // reflect the view vector
- float3 R = (2 * cosNO) * bsdf->N - I;
-
-#ifdef __RAY_DIFFERENTIALS__
- *domega_in_dx = (2 * dot(bsdf->N, dIdx)) * bsdf->N - dIdx;
- *domega_in_dy = (2 * dot(bsdf->N, dIdy)) * bsdf->N - dIdy;
-#endif
-
- float3 T, B;
- make_orthonormals (R, &T, &B);
- float phi = M_2PI_F * randu;
- float cosTheta = powf(randv, 1 / (m_exponent + 1));
- float sinTheta2 = 1 - cosTheta * cosTheta;
- float sinTheta = sinTheta2 > 0 ? sqrtf(sinTheta2) : 0;
- *omega_in = (cosf(phi) * sinTheta) * T +
- (sinf(phi) * sinTheta) * B +
- ( cosTheta) * R;
- if(dot(Ng, *omega_in) > 0.0f)
- {
- // common terms for pdf and eval
- float cosNI = dot(bsdf->N, *omega_in);
- // make sure the direction we chose is still in the right hemisphere
- if(cosNI > 0)
- {
- float cosp = powf(cosTheta, m_exponent);
- float common = 0.5f * M_1_PI_F * cosp;
- *pdf = (m_exponent + 1) * common;
- float out = cosNI * (m_exponent + 2) * common;
- *eval = bsdf_phong_ramp_get_color(bsdf->colors, cosp) * out;
- }
- }
- }
- return LABEL_REFLECT|LABEL_GLOSSY;
+ const PhongRampBsdf *bsdf = (const PhongRampBsdf *)sc;
+ float cosNO = dot(bsdf->N, I);
+ float m_exponent = bsdf->exponent;
+
+ if (cosNO > 0) {
+ // reflect the view vector
+ float3 R = (2 * cosNO) * bsdf->N - I;
+
+# ifdef __RAY_DIFFERENTIALS__
+ *domega_in_dx = (2 * dot(bsdf->N, dIdx)) * bsdf->N - dIdx;
+ *domega_in_dy = (2 * dot(bsdf->N, dIdy)) * bsdf->N - dIdy;
+# endif
+
+ float3 T, B;
+ make_orthonormals(R, &T, &B);
+ float phi = M_2PI_F * randu;
+ float cosTheta = powf(randv, 1 / (m_exponent + 1));
+ float sinTheta2 = 1 - cosTheta * cosTheta;
+ float sinTheta = sinTheta2 > 0 ? sqrtf(sinTheta2) : 0;
+ *omega_in = (cosf(phi) * sinTheta) * T + (sinf(phi) * sinTheta) * B + (cosTheta)*R;
+ if (dot(Ng, *omega_in) > 0.0f) {
+ // common terms for pdf and eval
+ float cosNI = dot(bsdf->N, *omega_in);
+ // make sure the direction we chose is still in the right hemisphere
+ if (cosNI > 0) {
+ float cosp = powf(cosTheta, m_exponent);
+ float common = 0.5f * M_1_PI_F * cosp;
+ *pdf = (m_exponent + 1) * common;
+ float out = cosNI * (m_exponent + 2) * common;
+ *eval = bsdf_phong_ramp_get_color(bsdf->colors, cosp) * out;
+ }
+ }
+ }
+ return LABEL_REFLECT | LABEL_GLOSSY;
}
-#endif /* __OSL__ */
+#endif /* __OSL__ */
CCL_NAMESPACE_END
-#endif /* __BSDF_PHONG_RAMP_H__ */
+#endif /* __BSDF_PHONG_RAMP_H__ */
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